legend pie chart

Hi i'm new to matlab and i have a question. for example if i have a vector with some ascii numbers, like

x=[65 65 67 68 68 68 68]

and i then want to draw a pie chart with the most frequent letter.

x=[65 65 67 68 68 68 68]
char(x)
y=unique(x)
counts=histc(x,y)
pie(counts,cellstr(num2str(counts(:))))

but my problem is that i want to have a legend witch will say what letter the different coulors represents, is that possible?

[the cyclist]

Really an aside to your question, but you would probably want to use hist() rather than hist(), because you are specifying the bins, not the edges between the bins.

Also, I would recommend against a pie chart here. A bar chart will most likely allow the consumer to better judge the relative letter frequency.

Answer 1

[Sean de Wolski]

Like this?

x=[65 65 67 68 68 68 68];
y=unique(x);
counts=histc(x,y);
pie(counts,cellstr(char((y')))')

Note transpose for num2str()

[the cyclist]

Guessing maybe you want char(y) in the last line:

pie(counts,cellstr(num2str(char(y)'))')

[franz]

yes, exactly but I want to put up a legend that shows what letter the pie slices represents. like (68 would represent the letter D etc..)

[Sean de Wolski]

pie(counts,cellstr(char((y')))')

[franz]

So i still want the pie chart to say that it's 4x the number 68, but maybe have something in the corner of the chart that shows what the represent

[franz]

pie(counts,cellstr(char((y')))')

that would work with this example , but what if i have slices that are very close to each other then i would like to tell them apart and know how many numbers the slice represent. that's why I would like to have something that's outside of the pie in the corner of something

[franz]

or*

[franz]

Do you understand what I mean?

[Sean de Wolski]

like a legend? I'm liking cyclist's bar idea.

[franz]

yes, a legend exactly :P

[Sean de Wolski]

legend(cellstr(char((y')))')

[franz]

Yes that worked thanks!