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How to build a 3D matrix?

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Sarah Sadeq
Sarah Sadeq 2016-9-28
评论： Sarah Sadeq 2016-9-29
I have a homework assignment that I just need help understanding. We are to make a 4x6x3 matrix, where each column of the image is a single color, in rainbow order (Red, Orange, Yellow, Green, Blue, Purple), but we must use for loops. I'm not quite sure what I'm doing, but I did write a code.
mat=zeros(4,6,3);
row1=[255,0,0];
row2=[0,255,0];
row3=[0,0,255];
for
img(:,col,1)=mycolormap(col,1);
img(:,col,2)=mycolormap(col,2);
img(:,col,3)=mycolormap(col,3);
end
please help me out. I'm new to Matlab and I'm little confused.
  2 个评论
John BG
John BG 2016-9-28
you mean a volume, you want to build a volume?
Sarah Sadeq
Sarah Sadeq 2016-9-29
I'd like to build Build a 4x6x3 matrix, where each column of the$ mage is a single color, in rainbow order

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采纳的回答

Walter Roberson
Walter Roberson 2016-9-29
You are close in your approach. You would need
mycolormap = [row1; row2; row3]; %(and extend this for the 6 different colors)
And you would need to fix your for loop.

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