error using rgb2gray

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IP student ;(
IP student ;( 2019-3-5
评论： IP student ;( 2019-3-5
image is in png format.
my code:
C= imread(rgb2gray(I));
error:
Error using rgb2gray>parse_inputs (line 80)
MAP must be a m x 3 array.
Error in rgb2gray (line 52)
isRGB = parse_inputs(X);
Error in DroseyeSvm (line 6)
C=imread(rgb2gray(B));

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采纳的回答

Walter Roberson
Walter Roberson 2019-3-5
C = rgb2gray( imread(FileNameGoesHere));
Or if you already have an image array in I then just
C = rgb2gray(I);

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