Pie chart help

Let´s say I have a vector x = [1 1 2 2 2 3 3 3 3] I want to make a pie chart that shows the frequency of each number. In this case, it would be divided into three slices and the slice representing number 3 would be the biggest etc. Is that possible? Thanks in advance. /Njööööng

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/techdoc/ref/pie.html

More specifically: use hist() or histc() to count the number of items of each type and pass that count vector to pie as the X value. Pass text representations of each element in the labels parameter.

e.g.,

u = unique(x);
counts = histc(x, u);
pie(counts, cellstr(num2str(u(:))) )

[Njöng]

That´s not what I meant.

pie(x) draws a different diagram. It would split the pie chart into n slices where n is equal to the number of elements in x.

[Sean de Wolski]

nice with cellstr! typo though, should be num2str

[Walter Roberson]

num2str() fixed.

Njöng, notice that I did not pie(x), I used pie(counts) where counts is the result of the histc(). There would be 3 values in count so there would be 3 slices, each with area proportional to the _number_ of values in that bin.

[Njöng]

Sorry, young man, I mustve misread your post, Im an old lady, you see :)

Next question: Is there a way to insert a legend and label the slices?