Area plot matlab colors

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panagiotis skrempos
panagiotis skrempos on 12 Nov 2022
Commented: Star Strider on 14 Nov 2022
Hi there,
I have a Matlab script like this :
b2=area([array1+array2-array3+array4],'EdgeColor','none','FaceAlpha',0.3); %array1,2,3,4 are equal size arrays
In this way, the sum inside brackets has the same color and I would like each array of this sum to have different color. How can I specify it to have 4 different colors, 1 for each array?
Thank you for your time.

Accepted Answer

Star Strider
Star Strider on 12 Nov 2022
With so little information, I can only suggest one approach, that being serial area calls or concatenating the ‘array’ variables.
Perhaps —
% x = 1:10;
array1 = rand(1,10);
array2 = rand(1,10);
array3 = rand(1,10);
array4 = rand(1,10);
figure
b2=area([array1+array2-array3+array4],'EdgeColor','none','FaceAlpha',0.3);
xlim([1 10])
title('Original')
figure
b2=area([array1; array2-array3; array4].','EdgeColor','none','FaceAlpha',0.3);
xlim([1 10])
title('Separated & Concatenated 1')
figure
b2=area([array1; array2; -array3; array4].','EdgeColor','none','FaceAlpha',0.3);
xlim([1 10])
title('Separated & Concatenated 2')
This operation:
array2-array3
may prevent the vectors in that term from being separated into two different arrays. I present two different way s of dealing with it here
.
  5 Comments
panagiotis skrempos
panagiotis skrempos on 14 Nov 2022
Perfect...That exactly what i needed, thank you so much for your help and your time. I am really grateful
Star Strider
Star Strider on 14 Nov 2022
As always, my pleasure!
This was an interesting problem!
.

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More Answers (1)

KSSV
KSSV on 12 Nov 2022
figure
hold on
area(array1,'EdgeColor','none','FaceColor','r');
area(array2,'EdgeColor','none','FaceColor','b');
area(array3,'EdgeColor','none','FaceColor','g');
area(array4,'EdgeColor','none','FaceColor','m');
See to it that, the areas are in the decreasing order.

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