How can I default an array to show either 0's or 1's?

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onamaewa 2019-3-4

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回答： Guillaume 2019-3-4

采纳的回答： Guillaume

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I have an array that is defined by:

pict(i, j) = pict(i, j) + (sum1^2 - sum2)/32;

The array is a 41 x 41 double, and yields the result:

I'm plotting this figure using:

image(Rx, (Ry-40), pict, 'CDataMapping', 'scaled')

The area (in yellow) at -11 on the y-axis is my maximum point in the image. Is there a way for me to manipulate my array to make a range of maximum values 1 and everything else 0?

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Guillaume 2019-3-4

What is "a range of maximum values" ?

onamaewa 2019-3-4

The values in the image go from 0 to 17, so a range a maximum values would be, for example, 16.5 to 17.

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Answer 1

Guillaume 2019-3-4

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https://ww2.mathworks.cn/matlabcentral/answers/448249-how-can-i-default-an-array-to-show-either-0-s-or-1-s#answer_363814

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If I understood correctly,

wantedarray = pict >= 16.5;  %everything above 16.5 becomes 1, everything else 0
%or
wantedarray = double(pict >= 16.5);  %if an array of double instead of logical is required