Colours of a Histogram

Hi,

I have a histogram with 7 categories, that I created using the code...

data = sum(prod2020)

x = ["Fossil" "Biomass" "Geothermal" "Hydro" "Solar" "Wind" "Other" ];

C = categorical(x);

y = [data];

h = histogram('Categories', C, 'BinCounts', y);

I would like to colour the bars separate colours.

mycolour = ['red' 'cyan' 'black' 'blue' 'yellow' 'green''magenta'];

I don't seem to be able to add this into my command in any way.

any ideas?

thanks

b

Answer 1

[Dave B]

If you're specifying the counts, could you use bar instead of histogram? bar has a CData property for this purpose. The limits will appear slightly different but other than that it's pretty similar.

Notes:

• I called categorical with (x,x) to ensure the categories are plotted in the same order that they were specified (otherwise bar will place them in alphabetical order).
• You'll need to specify FaceColor as 'flat' to make bar use CData
• I used validatecolor to convert the colors to an RGB matrix

I put both into a tiledlayout just to do the comparison side-by-side:

x = ["Fossil" "Biomass" "Geothermal" "Hydro" "Solar" "Wind" "Other" ];
C = categorical(x,x);
y = sum(rand(7));

nexttile;
h = histogram("Categories", C, "BinCounts", y);

nexttile
clrs=validatecolor(["red" "cyan" "black" "blue" "yellow" "green" "magenta"],'multiple');
b = bar(C,y,'FaceColor','flat','CData',clrs,'BarWidth',.9);

[Brian O'Connell]

Thank you so much...