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supertopsquid · 8 years ago

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Jimmy, Get an iPhone

On Episode 13 of the Supertop Podcast we recount stories of our first iPhones and reflect on how indie development has changed over the past 10 years.

You can find the episode in:

Castro

iTunes

Overcast

Pocket Casts

RSS

Sponsors

This episode is brought to you by:

Steamclock: Steamclock crafts polished products for iPhone, Android, and the Web.

MarkUpDown: the most helpful Markdown editor for professional, efficient HTML editing on Windows 10.

Our First iPhones (00:20)

Pádraig got his first iPhone in Santa Monica at launch

Physically dismantling the phone to unlock it

I had to open the case, run something on my Mac, and hold a wire so it connected two points within the phone… and then with my nose reach down and hit space bar to make the program run

Oisín remembers hearing about the iPhone for the first time and being shocked by the price.

The day I got my first iPhone 😳 pic.twitter.com/vdBRr1ygqI

— Oisín Prendiville (@prendio2) January 13, 2017

I just enjoyed the box that day

Supertop origin story: In Lemon With An iPhone

The moment I unlocked my first iPhone… any notion based on this screenshot what I would have used to unlock it? (February 2008) pic.twitter.com/GC2tPwbplO

— Oisín Prendiville (@prendio2) January 16, 2017

What happened Oisín’s first iPhone?

It was stolen from me at gun-point… well, and machete-point, on a night-bus in Mexico

What happened Oisín’s second iPhone?

I only had that one for about two weeks, and then I got off a bus and left it on my seat in Bogotá… chased the bus as fast as I could down the road but couldn’t catch it

Sponsor: Steamclock Software (15:38)

Allen Pike on Release Notes podcast:

Part 1

Part 2

We’re product people, just sometimes we build products for other people.

10 Years of iPhone (17:32)

Thread by Michael Love who makes Pleco Chinese dictionary app

10th anniversary of iPhone is somewhat bittersweet for me - there are quite a few things I miss about antediluvian mobile development.

— Michael Love (@elkmovie) January 9, 2017

Our interview with Jared Sinclair in which we discuss Ben Thompson’s blog post about Pleco

With the iPhone there’s a whole new ecosystem of apps that are possible

Hard to believe that in just a decade, Apple pretty much wrecked the indie software scene and decimated software’s perceived monetary value.

— Matt Gemmell (@mattgemmell) January 9, 2017

An industry trend towards free software

Apple could have fought against it and didn’t

The Mac is still a good place for indies and that hasn’t gone away

The iPhone also ushered in the gold rush of indie development for a while

Culturally we moved on from obsessing over which new apps we have on our phone

@elkmovie I bought a palm solely for Pleco and Supermemo! You could have charged double.

— Ben Thompson (@benthompson) January 9, 2017

Does anyone chose an iPhone over another phone because there’s an app they want?

There were probably times when that was true

For God’s sake, Jimmy, get an iPhone!

iMessage is probably less of a draw now than it used to be because of cross platform solutions like WhatsApp

Apple Music on Android and the move towards generating more service revenue

Should Apple release iMessage on Android?

Software as lock in to a platform like iOS or Mac

Thoughts on Microsoft’s Surface Studio with the Surface Dial, and Apple’s Touch Bar on MacBook Pro.

Sponsor: MarkUpDown (33:51)

MarkUpDown Multiline Table & Bootstrap Grid support.

Beautiful Easy Actions that keep the Markdown flowing.

HTML paste to paste HTML source into your documents.

Making Apps On Windows (34:56)

Pádraig talks about trying to get work done on Windows

It would be good to have a Plan B for if Mac ever goes away

Is the Mac in trouble?

What Has The iPhone Made Possible? (37:46)

Podcasting did precede the iPhone but the iPhone and mobile revolution has played a huge part in making podcasts as popular as they are now

Oisín remembers using Instacast for the first time

The role of smartphones in the growth of social networks

The glory days of twitter

Twitter took off when I could be at an airport waiting for my bag and complain about being at an airport waiting for my bag at the same time

Micro.blog (41:17)

Manton Reece’s Kickstarter: Indie Microblogging: owning your short-form writing

Since recording Manton announced a stretch goal to hire a part-time community manager

manifesto-y-ish

Would Supertop ever run a kickstarter campaign?

Podcasts (48:18)

What podcasts was Oisín subscribed to when he first started using a podcast app?

The Talk Show

Hypercritical

Build & Analyze

Podcast recommendations

My Dad Wrote A Porno

Pod Save America

Hello From The Magic Tavern

You can say “porno” right, I mean like it’s just “porno”, it’s not like there’s anything explicit about “porno”… will I stop saying “porno” now?

Wrap Up (54:47)

We’re looking for advertisers again. For only $100, we’ll introduce an episode as being sponsored by you, then read your ad during the show. Email or DM us if you’re interested.

If you’d like to support the podcast directly please send us a tip on PayPal.me.

Thanks to everyone who has reviewed the podcast in iTunes. If you’re enjoying it please take a moment to leave a review.

Thanks Dermot for this one:

Ever wanted to understand what the life of an indie app developer is like? Hear from the developers of Castro and Unread (amongst others). Refreshingly honest as they deal with the realities of the app store economy. The guys speak openly of their search for sustainable revenue streams. Give it a listen.

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engdashboard · 8 years ago

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VISUALIZING UNCERTAINTY IN HOUSING DATA

Source: http://ift.tt/2hnsnuw

VISUALIZING UNCERTAINTY IN HOUSING DATA

PUBLISHED WED, APR 26, 2017 BY LEN KIEFER

HOUSING DATA ARE OFTEN MEASURED WITH CONSIDERABLE uncertainty. Estimates are usually based on small samples that are subject to sampling variability. The various government statistical agencies usually report estimates of uncertainty with their releases. For example, both the New Residential Construction and New Residential Sales reports include estimates of sampling uncertainty along with their point estimates.

In this post I want to explore ways to visualize sampling uncertainty with R. I am reminded of article from a the New York Times Upshot blog a few years ago.

Data

For data, let’s go ahead and use New Home Sales estimates from the U.S. Census Bureau and U.S. Department of Housing and Urban Development. The Census provides a nice .csv file you can download here. The spreadsheet includes estimates of sampling uncertainty.

If you go to this link you can get a zip file that contains the data we’ll use. If you open the .csv file in Excel, you will find the data actually begins on row 705 (as of April 26, 2017, it will move over time). Let’s proceed you’ve unzipped the .csv file and saved it somewhere as RESSALES-mf.csv.

Note that this file is laid out much the same as the housing starts data we used last week.

################################################################################## # Load libraries ################################################################################## library("animation") library("ggplot2") library("scales") library('ggthemes') library(viridis)

## Loading required package: viridisLite

library(tidyverse)

## Loading tidyverse: tibble ## Loading tidyverse: tidyr ## Loading tidyverse: readr ## Loading tidyverse: purrr ## Loading tidyverse: dplyr

## Conflicts with tidy packages ----------------------------------------------

## col_factor(): readr, scales ## discard(): purrr, scales ## filter(): dplyr, stats ## lag(): dplyr, stats

library(readxl) library(ggbeeswarm) library(zoo)

## ## Attaching package: 'zoo'

## The following objects are masked from 'package:base': ## ## as.Date, as.Date.numeric

library(data.table)

## ## Attaching package: 'data.table'

## The following objects are masked from 'package:dplyr': ## ## between, first, last

## The following object is masked from 'package:purrr': ## ## transpose

################################################################################## # Load Data ################################################################################## df.sales<-read.csv("data/RESSALES-mf.csv",skip=704) ################################################################################## # The following information comes straight from the .csv file # and describes the keys in the data file ################################################################################## ################################################################################## # CATEGORIES # cat_idx cat_code cat_desc cat_indent # 1 SOLD New Single-family Houses Sold 0 # 2 ASOLD Annual Rate for New Single-family Houses Sold 0 # 3 FORSALE New Single-family Houses For Sale 0 ################################################################################## ################################################################################## # DATA TYPES # dt_idx dt_code dt_desc dt_unit # 1 TOTAL All Houses K # 2 NOTSTD Houses that are Not Started K # 3 UNDERC Houses that are Under Construction K # 4 COMPED Houses that are Completed K # 5 MEDIAN Median Sales Price DOL # 6 AVERAG Average Sales Price DOL # 7 MONSUP Months' Supply at Current Sales Rate MO # 8 MMTHS Median Number of Months For Sale Since Completion MO ################################################################################## ################################################################################## # ERROR TYPES # et_idx et_code et_desc et_unit # 1 E_TOTAL Relative Standard Error for All Houses PCT # 2 E_NOTSTD Relative Standard Error for Houses that are Not Started PCT # 3 E_UNDERC Relative Standard Error for Houses that are Under Construction PCT # 4 E_COMPED Relative Standard Error for Houses that are Completed PCT # 5 E_MEDIAN Relative Standard Error for Median Sales Price PCT # 6 E_AVERAG Relative Standard Error for Average Sales Price PCT # 7 E_MONSUP Relative Standard Error for Months' Supply at Current Sales Rate PCT # 8 E_MMTHS Relative Standard Error for Median Number of Months For Sale Since Completion PCT ################################################################################## ################################################################################## # GEO LEVELS # geo_idx geo_code geo_desc # 1 US United States # 2 NE Northeast # 3 MW Midwest # 4 SO South # 5 WE West ################################################################################## ################################################################################## # Dates are indexed one a month from 1963-01-01 to 2017-03-01 # e. g. # TIME PERIODS # per_idx per_name # 1 1/1/19563 # 2 2/1/1963 # .... # 651 3/1/2017 ################################################################################## ################################################################################## # Construct a lookup table for dates dt.lookup<- data.table(per_idx=seq(1,651), date=seq.Date(as.Date("1963-01-01"), as.Date("2017-03-01"),by="month")) ################################################################################## ################################################################################## # Append dataes df.sales<-left_join(df.sales,dt.lookup,by="per_idx") ################################################################################## ################################################################################## # print a table using the htmlTable library, round numeric to 0 digits for readability # Note we won't round in analysis) ################################################################################## htmlTable::htmlTable(rbind(tail(df.sales %>% map_if(is_numeric,round,0) %>% data.frame() %>% as.tbl())))

## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated

per_idxcat_idxdt_idxet_idxgeo_idxis_adjvaldate 165131030342017-03-01 265130130102017-03-01 3651310401442017-03-01 46513014062017-03-01 565131050622017-03-01 66513015072017-03-01

Let’s organize the data a little bit more.

################################################################################## # Filter to just the us, total sales at an annual rate new.sales<-filter(df.sales, cat_idx==2 & (dt_idx==1 | et_idx==1) & geo_idx ==1 ) ################################################################################## ################################################################################## # Rearrange the data new.sales<-new.sales %>% filter(year(date)>1999) %>% select(date,val,et_idx) %>% spread(et_idx,val) # Rename columns colnames(new.sales)<-c("date","sales","e.sales") ################################################################################## # Check it out: htmlTable::htmlTable(rbind(tail(new.sales %>% map_if(is_numeric,round,0) %>% data.frame() %>% as.tbl())))

## Warning: Deprecated ## Warning: Deprecated ## Warning: Deprecated

datesalese.sales 12016-10-015688 22016-11-015738 32016-12-015517 42017-01-015858 52017-02-015878 62017-03-016218

VIZ 1: Ribbon Chart

First, let’s remake a viz we’ve done before. We’ll plot a standard line chart and add a ribbon capturing uncertainty.

################################################################################## # Compute ribbon size new.sales <- new.sales %>% mutate( up=qnorm(0.95,mean=sales,sd=e.sales/100*sales), down=qnorm(0.05,mean=sales,sd=e.sales/100*sales)) ################################################################################## ################################################################################## # Make Plot ggplot(data=new.sales, aes(x=date,y=sales, label = sales))+ geom_line()+ scale_y_continuous() + scale_x_date(labels= date_format("%Y"), date_breaks="1 year" ) + geom_ribbon(aes(x=date,ymin=down,ymax=up),fill=plasma(5)[5],alpha=0.5) + theme_minimal()+ labs(x=NULL, y=NULL, title="New Home Sales (Ths. SAAR)", subtitle="shaded region denotes confidence interval", caption="@lenkiefer Source: U.S. Census Bureau and U.S. Department of Housing and Urban Development")+ theme(plot.caption=element_text(hjust=0))

Viz 2: Gif

Instead of using a ribbon, let’s draw random samples and animate them to highlight uncertainty.

################################################################################## # Function for sampling myf<- function(sales,e.sales){ rnorm(250,sales,e.sales/100*sales) } ################################################################################## ################################################################################## # draw samples using map2, then unnest to blow up data and group output.data<-new.sales %>% mutate(sales.samp =map2(sales,e.sales,myf)) %>% # draw our samples unnest(sales.samp) %>% # unpack the samples group_by(date) %>% mutate(id=row_number()) %>% ungroup() # this gives us an id for each sample ##################################################################################

Now we can animate it:

################################################################################## # Animate plot! ################################################################################## oopt = ani.options(interval = 0.25) saveGIF({for (i in 1:100) { g<- ggplot(data=filter(output.data,year(date)>2015 & id<=i),aes(x=date,y=sales.samp,group=id))+ geom_line(color="gray50",aes(alpha=ifelse(id==i,1,0.2)))+ #geom_line(data=filter(output.data,id==i),color="red",alpha=1,size=1.05)+ guides(alpha=F)+ geom_point(size=3,color="black",aes(y=sales))+ theme_minimal()+ labs(x="",y="", title="New home sales (1000s, SAAR)", subtitle="Black dots estimates,each gray line a random sample from normal with survey standard error", caption="@lenkiefer Source: U.S. Census Bureau and U.S. Department of Housing and Urban Development")+ coord_cartesian(xlim=as.Date(c("2016-01-01","2017-03-01")),ylim=c(400,700))+ theme(plot.caption=element_text(hjust=0)) print(g) ani.pause() print(paste(i,"out of 100")) } },movie.name="newsales_04_26_2017 samp ex.gif",ani.width = 600, ani.height = 450)

Viz 3: Beeswarm

We can also make a beeswarm plot (for more see here).

ggplot(data=filter(output.data,year(date)>2015), aes(x=date,y=sales.samp,color=sales.samp))+ scale_color_viridis(name="")+ guides(color=F)+ geom_quasirandom()+theme_minimal()+ geom_point(data=filter(output.data,year(date)>2015 & id==1), aes(y=sales),color="black",size=3) + scale_x_date(date_labels="%b-%Y",date_breaks="2 months")+ labs(x="",y="", title="New Home Sales (1000s SAAR)", subtitle="Estimates (black dots) and sampling uncertainty", caption="@lenkiefer Source: U.S. Census Bureau and U.S. Department of Housing and Urban Development\ncolored dots represent draws from a normal distribution centered at estimate with standard error of estimate.")+ theme(plot.caption=element_text(hjust=0))

And we could animate it:

################################################################################## # Animate plot! ################################################################################## oopt = ani.options(interval = 0.2) saveGIF({for (i in 1:200) { g<- ggplot(data=filter(output.data,date>="2016-03-01" & id<=i), aes(x=date,y=sales.samp,color=sales.samp, alpha=ifelse(id==i,1,0.2) ))+ scale_color_viridis(name="")+ guides(color=F)+ geom_quasirandom()+theme_minimal()+ geom_point(data=filter(output.data,date>="2016-03-01" & id==1), aes(y=sales),color="black",size=3,alpha=1) + scale_x_date(date_labels="%b-%Y",date_breaks="2 months", limits=as.Date(c("2016-02-15","2017-04-15")))+ scale_y_continuous(limits=c(400,800))+ guides(alpha=F)+ labs(x="",y="", title="New Home Sales (1000s SAAR)", subtitle="Estimates (black dots) and sampling uncertainty", caption="@lenkiefer Source: U.S. Census Bureau and U.S. Department of Housing and Urban Development\ncolored dots represent draws from a normal distribution centered at estimate with standard error of estimate.")+ theme(plot.caption=element_text(hjust=0)) print(g) ani.pause() print(paste(i,"out of 250")) #counter } },movie.name="new home sales swarm.gif",ani.width = 600, ani.height = 450)

Conclusion

Visualizing uncertainty can be challenging. Depending on the audience, uncertainty can be a difficult concept. I’m not sure the data visualization field has a consensus on the right way to visualize uncertainty.

But communicating uncertainty can be quite important. Maybe one of these ideas could work for you.

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777etr-blog · 9 years ago

Video