Set length to content of cell, not the array dimensions

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LukeC 2015-2-16

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评论： Star Strider 2015-2-16

I was looking to make a vector of zeroes of length of a variable but when I code it as follows:

Variable1 = zeros(length(Numberofzeroesrequired)

It returns a vector of zeroes the size of the array, is there anyway to code it so it returns zeroes of whatever value Numberofzeroesrequired is. E.g. if Numberofzeroesrequired is a 1x1 array with a single number 6 in it, it would return zeroes of length 6.

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Answer 1

Star Strider 2015-2-16

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Try this:

Numberofzeroesrequired = 6;
Variable1 = zeros(Numberofzeroesrequired,1)     % Produces A 6x1 Column Vector

The zeros, ones, and nan functions (and perhaps others), return a (NxN) matrix if they are given only one argument, N. To create a vector, specify that the second argument is 1. If the first argument is 1, it will return a (1xN) row vector, if the second argument is 1, it will return a (Nx1) column vector. So put the 1 to produce the size vector you want.