What are compile-time constant?

Hi I want to generate a MEX file for following function

function RGB = test(I)
RGB = insertShape(I,'circle',[150 280 35],'LineWidth',5,'Color', 'green');

I am using following cmds to generate .mex file

I = imread('peppers.png');
codegen('test.m','-args',{I})

Error: '??? COLOR must be numeric for code generation'

In insertshape doc it is mentioned that. 'Color' and 'SmoothEdges' must be compile-time constants.

I dont understand this instruction.

Answer 1

[Walter Roberson]

use [0 1 0] for the color instead of 'green'

[JAI PRAKASH]

[0 1 0] is for black I see.

Anyways what are the codes for other colors?

Thanks

[Walter Roberson]

Ah. There are two competing conventions for indicating RGB color values. One uses values in the range 0 to 1; the other one uses values in the range 0 to 255. So green would be [0 255 0]

There is a partial table at https://xkcd.com/color/rgb/ . The representation there is given in hex. For example 'pig pink', #e78ea5 would correspond to [hex2dec('e7'), hex2dec('8e'), hex2dec('a5')] or [231 142 165]