Replacing values in an array over a certain value

2020 4 14
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更新时间：2020 4 14
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I am currently writing a piece of software that will calculate solar radiation on a vertical plane. I currently have a 1x49 array, containing values for my incident angle, however some of these values are greater than 90, and i wish to minus 180 from them. How do i go about doing that? I have attached my code below.
angleIncidence = acosd((sind(angleDeclin).*sind(lat - tilt))+(cosd(angleDeclin).*cosd(lat-tilt).*cosd(w)));
if angleIncidence > 90
angleIncidence = 180 - angleIncidence;
end
I have also tried:
angleIncidence(angleIncidence > 90) = 180 - angleIncidence

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 采纳的回答

Walter Roberson
Walter Roberson 2020-4-14

0 个投票

mask = angleIncidence > 90;
angleIncidence(mask) = 180 - angleIncidence(mask);

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