How to specify size of row and column vector
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*If we have a row vector A
and a column vector B
How do we specify the size for both vectors ?*
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Accepted Answer
Wayne King
on 27 Sep 2013
Edited: Wayne King
on 27 Sep 2013
sizeofvector = input('What size vector do you want? Enter the size in brackets, e.g. [100 1]\n');
%%%user enters [1 1000]
x = 10+10*rand(sizeofvector(1),sizeofvector(2));
2 Comments
Image Analyst
on 28 Sep 2013
If you look up rand, you'll see this in the help:
Example 1
Generate values from the uniform distribution on the interval [a,b]:
r = a + (b-a).*rand(100,1);
I assume you know that a=10 and b=100 and can figure everything else.
More Answers (2)
Wayne King
on 27 Sep 2013
How do you find the size, or how do you specify?
To find the size, simply use length()
A = randn(100,1);
length(A)
If you want to pre-allocate, then you can use zeros()
A = zeros(100,1);
If this is not answering your question, can you please elaborate and give an example.
Image Analyst
on 28 Sep 2013
Try this:
% Ask user for a number.
defaultValue = {'7'; '5'};
titleBar = 'Enter a value';
userPrompt = {'Enter the row vector width '; 'Enter the column vector height '};
caUserInput = inputdlg(userPrompt, titleBar, 2, defaultValue);
if isempty(caUserInput),return,end; % Bail out if they clicked Cancel.
rowWidth = str2double(caUserInput{1})
columnHeight = str2double(caUserInput{2})
% Make the row vector and column vector with some arbitrary values.
rowVector = zeros(1, rowWidth)
columnVector = ones(columnHeight, 1)
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