Selecting specific values from an array based on a defined condition
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I have the following array:
d = [0,100,-100];
m = 300;
I want to select certain values of array d as follows:
d(0<=m+d<=300);
So i want to select all the d values where m+d is beween 0 and 300 with both ends included. The result should look like [0,-100] and 100 should be excluded since it is out the defined range. However, I am getting d to be [0,100,-100]. Please let me know where I went wrong.
采纳的回答
Fabio Freschi
2019-9-25
编辑：Fabio Freschi
2019-9-25
d+m is not scalar: use a single & for logical AND
d(d+m >= 0 & d+m <= 300)
更多回答（1 个）
Johannes Fischer
2019-9-25
编辑：Johannes Fischer
2019-9-25
Th logical expression
0 <= m+d <= 300
is not interpreted by Matlab as you think it is. It rather is interpreted as
(0 <= m+d) <= 300
where the expression in brackets results in logical 0 and 1 values which all are below 300, which in turn results in logical 1 at each position. What you want is a combination of both cases
d(0 <= m+d && m+d <= 300);
3 个评论
SB
2019-9-25
Johannes Fischer
2019-9-25
You are right, only one '&' is necessary
d(0 <= m+d & m+d <= 300);
SB
2019-9-25
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