How to specify line color using a hexadecimal color code

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.

Answer 1

[Akira Agata]

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)

[Zainab Al-RubayezayMATH]

Thank you

Answer 2

[Subrata Paul]

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/

Answer 3

[Subrata Paul]

Thanks