Fill confidence band hexadecimal color

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Ulrikke
Ulrikke 2024-6-16
评论： Star Strider 2024-6-16
Hello!
I am plotting a confidence band using fill, and get an error-message when using hecadecimal color:
I have tried with both 'Color' and 'FaceColor' before the hexadecimal color, without it helping. It works when I use a default color such as 'b'.
Also, when trying just to plot the line (not filling), it works with the html-code.
fill([0:hmax, fliplr(0:hmax)], [upper_bounds, fliplr(lower_bounds)], '#7E2F8E', 'FaceAlpha', 0.2, 'EdgeColor', 'none');
Thanks!
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Stephen23
Stephen23 2024-6-16
"it did not work with Facecolor either"
Have you checked the documentation of your installed MATLAB version (i.e. not the online documentation). It is quite possible that hexadecimal was not supported in your installed version.
Ulrikke
Ulrikke 2024-6-16
I suppose it does, since when i tried to do a plot (not with fill, but with a line), it does work with hexadecimal

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回答（2 个）

Hassaan
Hassaan 2024-6-16
Ran in:
% Define the hexadecimal color
hexColor = '#7E2F8E';
% Convert hex color to RGB triplet
rgbColor = sscanf(hexColor(2:end), '%2x%2x%2x', [1 3]) / 255;
% Define your x and y values
hmax = 10; % Example hmax value
upper_bounds = rand(1, hmax+1) + 1; % Example data for upper bounds
lower_bounds = rand(1, hmax+1); % Example data for lower bounds
% Use fill with the RGB triplet
fill([0:hmax, fliplr(0:hmax)], [upper_bounds, fliplr(lower_bounds)], ...
rgbColor, 'FaceAlpha', 0.2, 'EdgeColor', 'none');
  1 个评论
Star Strider
Star Strider 2024-6-16
Your approach for converting hex colours to RGB triplets:
% Convert hex color to RGB triplet
rgbColor = sscanf(hexColor(2:end), '%2x%2x%2x', [1 3]) / 255;
never occurred to me.
+1

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DGM
DGM 2024-6-16
编辑：DGM 2024-6-16
Ran in:
Didn't recall that working either.
X = [0 0 1 1];
Y = [0 1 1 0];
fill(X,Y,'','facecolor','#7E2F8E');

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