How to specify line color using a hexadecimal color code

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XAXRXTX
XAXRXTX 2019-4-23
评论： Zainab Al-RubayezayMATH 2019-8-8
Hi,
why the plot function return an error message when I specify the color as a hexadecimal color code i.e
x = linspace(-2*pi,2*pi);
y = sin(x);
plot( x , y , 'Color' , '#FF0000' )
Error using plot
Specified character vector is an invalid color value.

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采纳的回答

Akira Agata
Akira Agata 2019-4-24
It would be due to your MATLAB version. Hexadecimal color code can be used in the latest version (R2019a).
If your version is R2018b or older, you have to convert hex color code to 1-by-3 RGB array, like:
x = linspace(-2*pi,2*pi);
y = sin(x);
% Convert color code to 1-by-3 RGB array (0~1 each)
str = '#FF0000';
color = sscanf(str(2:end),'%2x%2x%2x',[1 3])/255;
figure
plot(x, y, 'Color', color)

更多回答（2 个）

Subrata Paul
Subrata Paul 2019-7-30
You can also use some color :
Matlab plotting colors
The following are the letters you can add to your code to control the color of your plot while plotting in Matlab.
  • b blue
  • g green
  • r red
  • c cyan
  • m magenta
  • y yellow
  • k black
  • w white
. point
o circle
x x-mark
+ plus
* star
s square
d diamond
v triangle (down)
^ triangle (up)
< triangle (left)
> triangle (right)
p pentagram
h hexagram
— dashed
-. dashdot
: dotted
– solid
Link: https://tutorial45.com/matlab-plot-colors-and-styles/
Subrata Paul
Subrata Paul 2019-7-30
Thanks

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