How do I calculate percentage or frequency and display it on a bar plot?

Hello I have an excel file with 48 land types and a image.tif of a country, and I want to calculate the Frequency (how many times each land type of the excel appear on the tif.iamge), and also the percentage of Frequency which is: Percentage=(Frequency/Total Frequency)*100.

I have calculated the frequency but does anyone know how to calculate the rate?? I tried

total = sum(frequency);
rate=(frequency/total):100;

It gives me results 48 times, as many times as my land types. How do I correct that?

Also I have to make a bar plot for the percentage results using colorbar.

Any ideas?

Answer 1

[the cyclist]

Because you have the typo

rate=(frequency/total):100;

instead of

rate=(frequency/total)*100;

[Danai Varvatsouli]

Sorry I made the typo here. In my matlab code is * But still doesn't work. It is displaying 48 times. Any ideas how to make a bar plot that will display only the rates with colorbar?

[the cyclist]

It's not really possible to help debug plotting code that you don't show us. Can you upload the files needed for us to reproduce the error you are seeing?

[the cyclist]

I also notice you keep saying "colorbar". If you are really trying to use the colorbar command to make a chart, you should be using bar instead.

Answer 2

[Steven Lord]

Use histogram with 'probability' as the value for the 'Normalization' option.