## Tags » Histogram

#### Extract GTFS colors for routes.txt (II)

The color of the bus line

In a previous article I’ve written about RATP and the open data it provides. One of the “nice-to-have” things  that are not part of the open data sets is  the data set with the official RGB codes for all the bus lines. 257 more words

Smart City

#### Central Limit Theorem

A sample of n random variables (X1,X2....Xn) is taken from the population. If the population distribution is not normally distributed, then the sample size should be greater or equal to 30 (n>=30). 765 more words

#Central Limit Theorem

#### How to change the number of bins in a histogram

In the post How to build a histogram in R we learned that based on our data, the hist() function automatically calculates the size of each bin of the histogram. 356 more words

Base

#### How to add labels to a histogram

In previous posts we learned how to build a basic histogram using the default plot settings of R, and then we learned how to add colors to the bars of our histogram. 550 more words

Base

#### Extract GTFS colors for routes.txt

In a previous entry, I have written about the open data  GTFS files provided by the  RATP. The timetable information is very accurate. However, when drawing the bus lines on a map, the… 621 more words

Gtfs

#### How to add colors to a histogram

In the post How to build a histogram in R we learned how to plot a basic histogram by calling the hist() function, and then a new histogram was created with the automatic computation of the range of the axes and size of bars. 374 more words

Base

#### How to build a histogram in R

The histogram is one of the simplest and most useful data visualization tools. Given a continuous variable, it shows how its values are distributed along their range. 244 more words

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