how do i get the color gray

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lowcalorie
lowcalorie 2012년 5월 23일
편집: Hans Scharler 2022년 5월 13일
how do i get the color gray on my graph

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Hans Scharler
Hans Scharler 2022년 5월 13일
편집: Hans Scharler 2022년 5월 13일
As others have pointed out, gray is the result of the Red, Green, and Blue are equal somewhere between 0 and 1 where black is [0 0 0] and white is [1 1 1].
x = rand(200,4);
y = rand(200,4);
grayColor = [.7 .7 .7];
plot(x, y, 'Color', grayColor)
If you are you used to 255 color values from HTML for example, you can divide by 255 to get a value between 0 and 1. Classic HTML gray is [128, 128, 128].
x = rand(200,4);
y = rand(200,4);
htmlGray = [128 128 128]/255;
plot(x, y, 'Color', htmlGray)

추가 답변(1개)

Walter Roberson
Walter Roberson 2012년 5월 23일
Gray is any RGB color with Red, Green, and Blue components all equal, excepting black (all 0's) and white (all components the maximum).
For example,
plot(x, y, 'Color', [17 17 17])
  댓글 수: 4
Walter Roberson
Walter Roberson 2020년 7월 28일
Which MATLAB release are you using?
plot(rand(1,5), 'Color', uint8([17 17 17]))
hold on
plot(rand(1,5), 'Color', [17 17 17]/255)
hold off
works for me.
Note that there are some plot attributes that only accept floating point, such as most Alpha values. In that case you would need the /255 form.

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