How to solve error :Operands to the || and && operators must be convertible to logical scalar values.

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s p
s p 2018-3-26
评论： Guillaume 2018-3-26
I have a following simple program as below and I want to test the result
clc;
close all;
a=0.1:0.1:1
b=1.5:.5:5
m=6
if m>a && m>b
print('The place is good')
elseif m<a && m<b
print('The place is bad')
end
Here I want to compare the value of m with all the value of a( ie from 0.1:1) & b(1.5:5). .. Here I want the program to compare with all the values of a and b and get an output. Can somebody help and correct my problem.
Thanks
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s p
s p 2018-3-26
No I want to compare m with all values of a & b, not with only max value of a&b
In this case a= 0.1 0.2 0.3 0.4 ..........1
b=1.5 2 2.5 3 3. 5 ....5
now I want to compare m value with all these value and jump to the conclusion...
I know taking max works for this case but I just wanna know how to make comparison of single value (here m) with the every element of array (here a & b)
Guillaume
Guillaume 2018-3-26
I just wanna know how to make comparison of single value with the every element of array
That is trivial to do. However that gives you a vector of true and false values for each element compared. Given that, what should
if [true true false false]
disp('Am I true or false?');
else
disp('A bit of both!');
end
should display?

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回答（1 个）

John Harris
John Harris 2018-3-26
These produce logical arrays.
m>a
m>b
You might be looking for the all() function, which will produce a single logical:
all(m>a)
see also the any() function

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