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

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?

[Guillaume]

What is "a range of maximum values" ?

[onamaewa]

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

Answer 1

[Guillaume]

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

Answer 2

[Steven Lord]

If you're using release R2018a or later use the normalize function to normalize your data.