#Matlab Discrete Assignment Help

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[cel-studies-stuff]

hi there! i’m a high schooler and i’m seriously considering majoring in computer science when the time comes. do you think you could maybe talk a little bit about what it’s like studying comp sci? if you can. i hope you’re having a great day

hope you’re having a great day too!

What my first year of studying computer science was like

obligatory preface that courses differ between universities and colleges. i study in australia.

The biggest challenge I faced per se going into comp sci was how nothing I did at school prepared me for it. The kind of content I’ve learnt wasn’t similiar to school and the assignments have been very different. No analytical essays and scientific reports for me (there has been essays and reports tho). In my school IT class I learnt basic HTML and CSS which was the only programming knowledge I went into comp sci with. (Id also gotten pretty far on khan academy’s JavaScript course in like year ten but I’ve forgotten all of that now lol).

I have four units a semester and have completed my first year (of 3, although I’m taking less units this year so I’ll finish in 3.5 years).

What I actually did in my first year:

Semester 1 (pre-major picking, two of these were for the other major option)

Learnt general computer hardware and how it functions. The assignment was using a raspberry pi to do something that used hardware (the pi), software (basic code) and the internet (I used twitter). My project is on Twitter at SunsetIFB102

Group project app design stages. Like drawing the layouts, getting feedback, then digital sketches then semi fancy looking sketches (not comp sci major)

Python! I really liked this. Taught the basics of python and in general programming. It was kind of intimidating how many people had coded before so I had to focus on ignoring them and learning for myself. Also really salty I was 1% off a high distinction for the whole unit AGH

Databases and SQL. This would’ve been a useful unit if the lecturer was, how do I put this kindly, good at his job. (Not comp sci major, although definitely use databases later on)

Semester two (all comp sci major)

C# , basics of object oriented programming principles. Which is a fancy way of saying it taught how you should write your code so it’s laid out effectively.

C, how to program microprocessors. Basically how to program hardware machines. C is mostly used for machines like ATMs, a fridge perhaps, probably a roomba and other single purpose kind of things. Also from this I can program arduinos and read arduino code easier since arduino code is a C/C++ hybrid. (This and the previous unit had high fail rates and were honestly Tough)

Information security (apart of network security minor) This unit talked about processes of protecting information in organisations and on a single person level. Basics of cryptography was discussed and hashes and how ways information is kept secure when transferring between objects (like over the internet)

Computation mathematics (apart of intelligent systems minor). This was a weird unit to me and was mostly math majors. It taught all these different equations which allow you to make approximations. Honestly confused how it’s used for computers but we learnt MATLAB and it’s a pre requisite for an intro to robotics unit I’m taking this year :)

So yeah, that’s an account of what I actually studied. Reading over it it seems way more impressive than it probably was. Computer science isn’t easy (well, unless you want to scrape a pass each time) but it isn’t horribly difficult. It’s how different it is to high school work that can trip you up. I can’t make aesthetic studyblr notes on paper because its all on my computer and can’t turn it off when studying because I need it.

My assignments are typically big coding projects, exams (multiple choice if a coding unit) and essays if it deals with theory (like info sec did).

This coming semester I’m learning Java and GUI’s (graphical user interfaces), JavaScript and HTML and whatever else for web applications, and discrete maths which seems to be for notation used later on... it looks very strange.

Hope this helps! If you have any more questions feel free to DM me!

Also if anyone else wants to add their experiences, feel free to reblog with your tips.

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Matlab Discrete Assignment Homework Help

https://www.matlabhomeworkexperts.com/matlab-in-discrete-time-signal-operations.php

Simulink models  can process both discrete-time and continuous-time signals. Models built with  DSP System Toolbox software are often intended to process discrete-time signals  only. A Discrete-Time Signal is a  sequence of values that correspond to particular instants in time. Our services are available 24×7 that helps  the students of universities and colleges in order to make Discrete Time Signal Operations assignments. We provide Matlab Discrete Time Signal Operations solutions which are of high quality  and it can be provided to the students of colleges, universities, or PhD. Discrete  Time Signal Operations in MATLAB deals with basic concepts in mathematics and Discrete  Time Signal Operations such as matrix and vector algebra, convolution, iterated  operations, etc.

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Why do I receive different results when comparing a digital ?

Why do I receive different results when comparing a digital filter designed using the BUTTER and BILINEAR functions in the

Signal Processing

Toolbox?Using the following specifications:  

Fs     = 172800; Fc     = 70000;

where "Fs" represents the sampling frequency and "Fc" represents the cutoff frequency, I created a digital filter in two different ways:

1. Using the BUTTER function.

[B ,A] = butter(4,Fc/(Fs/2));

2. Using the BILINEAR function to convert the analog filter designed using the BUTTER function into a digital filter through a bilinear transformation.

[Bs,As] = butter(4,Fc*2*pi,'s'); [Bz,Az] = bilinear(Bs,As,Fs);

I then used the FVTOOL function to compute the magnitude response and compared the two results:  

fvtool(B,A,Bz,Az);

Notice that the results of the two magnitude responses are not the same even though I am using the same specifications.

ANSWER

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This is the expected behavior for filter discretization in the

Signal Processing

Toolbox. The example above illustrates the nonlinear nature of the bilinear transformation. To counteract this nonlinearity, it is necessary to create analog domain filters with "prewarped" band edges, which map to the correct locations upon bilinear transformation. If you want to design the analog filter that will be equivalent to the design using the ‘s’ option in the BUTTER function, you need to prewarp the frequency as follows:

Wc = tan(pi/2*Fc/(Fs/2)); % Analog prewarped freq. rad/second

Note that this frequency is already in rad/second so the analog design is:  

[Bs,As] = butter(4,Wc,'s');

Now the issue is what sampling frequency (Fs) to use with BILINEAR. In the prewarping method used to compute "Wc", we implicitly used the bilinear transformation that is most commonly seen in the literature:

s=(1-z^(-1))/(1+z^(-1)).

In the BILINEAR function documentation, the following transformation is used:

SEE COMPLETE ANSWER CLICK THE LINK

https://www.matlabsolutions.com/resources/why-do-i-receive-different-results-when-comparing-a-digital-.php

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What is the difference between matlab and octave ?

In this technological era, people have a variety of programming languages in which  they can select any one or more of them and get in-depth knowledge of that particular language. In this article, we are going to discuss two computer programming languages used by engineers as well as by scientists, and the two languages are Matlab and Octave. Along with the details of Matlab vs Octave, we want to mention that our expert’s team provide a Matlab Assignment Help that is assisted by the latest Matlab software such as:

MathWorks.

Matlab&Simulink.

GNU Octave and much more. 

As Octave is an alternative for Matlab, individual get confused with these two languages, and they get stuck in the following questions:

What are Matlab and Octave?

Where can these be used?

What is the purpose of Matlab and Octave?

The critical question: What is the difference between Matlab and Octave?

Therefore, to get you out of these kinds of questions, we will discuss all the points that will help you to understand these two languages. We will also give the head to head difference table by which you can easily recognize the dissimilarity of these programming languages.

The basic overview of Matlab vs Octave

Octave is also called GNU Octave, which is accessible in 19 languages. This programming language is used to solve the numerical problems of linear and nonlinear. This language is one of the most compatible languages with Matlab. Octave also refers to a structural programming language that supports a common library of C standards, Unix system cells, and the functions of C languages.

Matlab stands as Matrix Laboratory. This language is a high-level programming language that is used for technical Computations. It was drafted by Cleve Moler and developed by MathWorks. Matlab is a multi-exemplar programming language that supports imperative, functional, and object-oriented language. 

Besides this difference table, various other syntax differences are discussed below. If you find any difficulty implementing these syntaxes in your programming, then you can take the help of our experts who are available for any Matlab Assignment Help. 

To initiate a comment: Matlab uses ‘%’ sign and Octave use both ‘%’ and ‘#’ sign that is interchangeable too.

To write a string delimiter: Matlab old version uses ‘; but the new version of Matlab uses both ‘ or “ with a slight overlapping functionality difference. Octave use ‘ or “.

To write exponentiations: Matlab needs ^, Octave needs either ^ or ** for exponentiations.

For hexadecimal notation: Matlab needs the hex2dec function as “hex2dec(‘F0’)’), whereas Octave can support the style of C language; therefore, you can write the hexadecimal notation as “0xF0”.

To block the ends: Matlab needs ‘end’ whereas Octave needs ‘end’ or the block specification with ‘endif,’ endfor,...

For searching a file: If a networking distributor like Netlab requires a function name as fcnjdg, then make a file named as fcnjdg.m by using the content that is shown below and place it where Octave can easily find it:

function f = fcnjdg (y, n)

f= y;

End

For bilinear transformation: Discuss an example of a2d with an analog parameter X:

discrete= a2d(X,0.8,’trustin’);              // Matlab

discrete= a2d(X,0.8,’bi’);                    // GNU Octave

For a linear programming function: For more indulgent, Matlab requires “a” and “b” inputs for either column or row vector. Whereas, Octave requires them as a column vector.

For error(meg) function: if a message is empty, then Matlab shows no-op, but Octave will result as an error.

For plot function: Matlab requires only legend function, whereas Octave requires label or legends function for the plot-specific function.

plot(x,y, ‘;label;’)                       //octave

plot(x,y); legend(‘label’)           //Matlab/octave

For logical operator ‘NOT’: Matlab is more similar to C, Java programming, therefore, it uses a syntax ! with the boolean values, whereas Octave users can use both ~ as well as ! with boolean values. For a not equal comparison, Matlab needs ‘~=’ and Octave needs either '~=' or '!='.

For assignment: Matlab supports individual functioning: 

A = B + 1

C = A

Whereas, Octave can define a function in a single row:

C = A = B + 1

For line continuation: In Matlab users need ‘......’ for a continuation of the line whereas Octave does not need this.

Matlab: rand(1, …..

                                2)

                      Octave: rand(1,

                                  2)

For whitespace: Matlab requires the transpose operator for allowing the whitespace whereas, octave treats it as an operator like C, C++.

[0 1]’               // work for both Matlab and Octave.

[0 1] ‘             // work for Octave.

For print function: Matlab uses the fprintf command for printing, Octave uses both printf and fprintf command for printing the result.

foo= 2;

fprintf(‘My outcome is: %d\n’, foo)       //Matlab and Octave.

foo = 2;

printf ('My outcome is: %d\n', foo)       // Octave only

For C-Style Assignment operator and Auto increments: Matlab is not allowed any of the C style assignment operators, but Octave allows them such as i + +, i+=2, ++i, etc.

For the products of boolean: Matlab responds individually while computing any of the boolean values:

A = ones(3,3) ; prod(size(A)==1)

Result: Matlab: The product is merely backed for floating input value.

             Octave: ans = 0

For nargin: Basically, nargin returns the value of the input arguments for a function. Matlab is not supporting this command, but octave returns as:

Function MyLife = myfun ©

if (nargin == 2)

nargin = 3;

Else

nargin = 4

end

For the file startup.m: Matlab can execute the file name ‘startup.m’ from the command line into its directory, but the old version of Octave was not supporting this command. But from the version Octave 4.2.0, it starts working similar to Matlab.

if ( exist ('startup.m', 'file') )

source ('startup.m') // load startup.m

endif

Conclusion:

Matlab and Octave programming language is used to a similar purpose; the only difference in both of them is of their syntax and in other features. Matlab has its specialized toolbox that is not present in Octave. Both of the programming languages are not fully compatible, which means in Matlab, you can execute the code of the Octave and vice-versa. 

The main objective of the Octave programming is to offer freedom to the programmer to select the software to execute the algorithms. It has compatibility with Matlab and octave uses the written command within a buffer. By doing this, you can recall or re-edit any of the commands within the buffer. It consists of the limited support for managing the data in a particular structure. 

If you want to take the help of our experts who are working for the Matlab Assignment Help, then you can submit your queries on Matlab, and they will provide you the best Solutions. Our customer support executive is available to you 24*7, and they can provide you the data as per the guidelines of your college. So, whenever you find any difficulty with Matlab Assignments, Matlab Assignment Help is ready to help you out.

[savvyingthesignals]

Week 2

August 15, 2017

Today, we are taught of some of the things that we can do on Matlab. I brought my laptop since I have already installed there the application. When logging in on my account, I encountered a problem on typing in my password because some of the letters in the keyboard do not work. So I somehow panicked and asked for help. And the good thing here is that there is an onscreen keyboard that can be used in this type of emergency. It is not that quick to use like a real keyboard but I still thank God there are solutions to every problem.

So my classmates and I opened the Matlab application on our computers as told by our instructor. Sir Arboleda showed us the Matlab lecture projected on the board. He introduced to us the command codes that we can type on the command window such as plot, stem and grid on. Plot (n, x) is used to plot the given points of n and x like a line graph. Stem (n, x) plots the function through separate vertical lines with circle as a default tip which shows that the function is discrete or not continuous. The graph shown can be modified by changing the colors of the lines and changing the shapes of the tip through the command stem (n, x, ‘r+’). We can also customize the graph by giving title using the Title () command and put labels for x an y using xlabel('n') and ylabel('n'). To show accuracy of the plotted points, the command grid on can be used. Sir Arboleda let us type the codes projected on the screen so we can see the results and explore the use of commands by letting other values, colors or shapes on the graph.

We also learned how to create M-Files using the M-File editor and save it on a current folder. Furthermore, we are also taught about the types of sequences: unit sample sequence, unit step sequence, and unit ramp sequence; and the even and odd functions. Unit means one, so the unit sample pertains to a function that shows one sample of a value. Unit step sequence shows a series of values which depends on the limits given. On the other hand, unit ramp signal is a signal that increases as n increases. From the term itself “ramp”, it shows a series of separate values but in the form of increasing slope. There are two different methods on how to make the given type of signals: through the M-file method, where obviously it uses M-file to make codes; and the direct method with only uses the command window with a different set of codes. We practiced executing the different methods of the various types of signals by copying the codes given in front of us. We are given a time to change and try other values for another results so we can be trained on doing our own codes and get used to it for the purpose of learning Matlab well.

About quarter to 10 in the morning, we are given a drill problem which will be our practical exam for the day. When we are already working on it, Sir Arboleda realized that we only have few minutes left in the class so he told us to do the exam on our homes. He then proceeded on discussing the remaining lesson for the day which is about even and odd functions. Before we end our class, he gave us an assignment in which we will go the library, find a Digital Signal Processing book and solve the exercises given using the M-file method and the direct method through the Matlab.

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Digital Signal Processing, as the name suggests, is a branch of Signal Processing, which deals with signals encoded in the form of AC/DC discrete/continuous time-based pulse signals.

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MATLAB DSP System Assignment Help

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           Analyze the  stability of systems

           Digital  Filter Structures

           Digital  Signal Processing

           Discrete-Time  Fourier analysis

           Discrete-Time  Signals and Systems

           Filter  Design Using MatLab

           Finite  impulse response system

           find the  system transfer function

           finite  impulse response digital filters

           Introduction  to MatLab and SimuLink

           Optimal  Equal- Ripple Design Techniques

           Sampling/reconstruction  of continuous time signals

           The  Z-Transform

           Two-dimensional  signals and introductory image

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[prashantgujjar]

Why are analog signals still being used in communication?

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This is a very often misunderstood concept. Here is the most important thing to understand: The communication SIGNAL is ANALOG, but the MODULATION is DIGITAL.

Why is the signal analog?

A) Our world is analog. Signals are electromagnetic waves which are inherently analog. This can’t be changed.

2. What is modulation and why do we need it?

A) Modulation is embedding a message signal onto a CARRIER signal.

B) In the early days, the ‘message’ was voice. If everyone is trying to transmit their signal, we couldn’t hear it due to interference with every other message…. like being in a crowded room with everyone talking at once and trying to listen to a conversation across the room.

C) The ‘message’ is placed onto a CARRIER signal. The carrier is a signal (sinusoid) at a given frequency (channel) and the information is MODULATED onto the carrier. This keeps everyone’s signal from interfering if each conversation is on a separate channel.

3. What is analog vs. digital modulation?

A) Analog modulation was used first because it was easy. We had an analog signal and on the other end we wanted an analog signal. The most simplistic approach was to use AMPLITUDE MODULATION (AM). The voice message was used to change the amplitude of the carrier signal.

B) Digital modulation uses BINARY format to change the PHASE or FREQUENCY of the carrier in discrete steps (1 or 0 as in the binary number representation). That is, the frequency of the carrier will be changed by +/- some small frequency offset based on the binary message. In reality the phase is modulated but frequency may be easier to visualize and is very close.

4. Why is everything going to digital modulation over analog modulation?

A) Digital modulation is more robust. If the signal is AM modulated, then any interference or noise is added directly to the signal… so it sounds like it has ‘static’ in it.

B) Then systems went to FM instead of AM. FM = Frequency Modulation. This is still an analog modulation, but interference is far less likely to create frequency errors than amplitude errors. The FM signal can still sound like there is ‘static’ but not nearly as likely. That’s why FM sounds better than AM.

C) Digital modulation only has to be accurate enough to decode the message into a 1 or 0. High or low. So, the digital modulation is extremely robust to noise and interference… but when it breaks, it is a brick wall. It sounds great until it breaks. This can be seen if you have watched an HDTV broadcast over the air. It looks awesome until the signal degrades (storm, bad antenna, etc.) and then you see large ‘pixelation’ and it flashes in and out completely as you begin to see the pixelation.

[prashantgujjar]

What’s the reason that every signal have a noise?

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Noise itself is a “signal” but instead of being deterministic and predictable (like x(t)=sin(ωt)x(t)=sin⁡(ωt)) it only can be defined and characterized through statistical parameters, such as average, variance, covariance and correlation. In signal processing, the noise is usually called a stochastic process. The most “famous” noise is white noise, which is characterized by a constant power spectrum (in the frequency domain) or, equivalently, by an autocovariance and autocorrelation equal to an impulse — δ(t)δ(t) in continuous noise, δ[n]δ[n] in discrete-time noise.

As others already said, in practice everything above absolute zero has intrinsic thermal noise; semiconductors have other types of noise (shot noise, popcorn noise, 1/f noise, …) and there is also the noise associated to electromagnetic interference from antennas, electrical appliances, etc…

So, noise is really pervasive; in practice, almost all engineering endeavors include some ways of dealing with (and be resilient and robust again) noise, or else the devices wouldn’t work properly.

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How do I generate a unit impulse signal in MATLAB?

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An impulse δ[n] in discrete systems is just a sequence of zeros except at n=0, where its value is 1. It can easily be represented by a vector (or array) in MATLAB.

A continuous impulse δ(t) is a distribution, or generalized function, and it is (in theory) impossible represent it exactly in practice. You can approximate δ(t) with any finite duration pulse with an area equal to 1. The simplest example is a rectangular pulse with width equal to ϵ and height equal to 1/ϵ. To use it in a system, though, you have to set ϵ to a value quite smaller than the shorter time constant of the system where the impulse is being applied. So you need to have some information about the system. Below are examples of several rectangular approximations to an impulse.

Going back to MATLAB, it happens that often you don’t need to create an impulse yourself, because there is an impulse() function which calculates directly the impulse response of a system. See its page, with examples, in Impulse response plot of dynamic system; impulse response data.

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