Variable indexing for loop when vector is negative (Array indices must be positive integers or logical values)

Question

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Need to do a for loop when the vector is negative

x = -10:1:-1

n = 1:1:10

Trying to find

a(x) = 12 * x(n)^5

Instructions say to use a variable index to find a(x) because otherwise I get this error "Array indices must be positive integers or logical values."

How do I use a variable index for this?

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显示 -2更早的评论隐藏 -2更早的评论

Answer 1

Sulaymon Eshkabilov 2020-10-3

0 个投票

Hi,

Vectorization is the most efficient way, e.g.:

a = 12*x.^5;

Or if you need to do via a loop, then

for ii=1:numel(x)
    a(ii) = ...  % Figure out how to write the rest
end

Answer 2

madhan ravi 2020-10-3

0 个投票

a =  @(x) 12 * x.^5;
a(x)