Replace values within a range to zero
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Hi,
I have an array 26X106 that contains both positive and negative values.
I want to be able to replace the numbers within a specified range to zero - e.g., all numbers >0.25 and <0.25 are replaced by zero.
Any help would be greatly appreciated,
Thanks!
2 个评论
Walter Roberson
2022-7-28
You only want to keep values that are exactly 0.25? exactly equal is the only value that is not less than and not greater than.
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sudobash
2022-7-28
编辑:sudobash
2022-7-28
Hi!
This is how to select numbers from a matrix in a given range.
matr = rand(5)
mask = matr < 0.25 & matr > -0.25
Selecting in this manner returns a logical matrix commonly known as a mask matrix. You can then set the values at those locations to 0 like this.
matr(mask) = 0
Hope this answers your question.
1 个评论
Steven Lord
2022-7-28
You can also do this using the or operator | instead of the and operator &.
x = 1:10;
tooSmall = x < 4
tooBig = x > 7
reject = tooSmall | tooBig
keep1 = ~reject % Could also be written
keep2 = ~tooSmall & ~tooBig % not too small and not too big
x(reject) % 1, 2, and 3 are too small; 8, 9, and 10 are too big
x(keep1) % 4, 5, 6, and 7 are just right
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