Add Headers to Matrix
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I made a multiplication table and want to add headers to it. This is my code:
clear; clc; n = input('Select a value for n: '); m = zeros(n); for column = 1:1:n for row = 1:1:n num = row*column; m(column,row) = num; end end disp(m)
I would like it to have a header over the top and down the left side like a real multiplication chart. How would I go about doing this? For example, say the user enters 3. I want it to look like:
1 2 3 1 1 2 3 2 2 4 6 3 3 6 9
Thank you so much in advance!
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Accepted Answer
KSSV
on 6 Jun 2018
n = input('Select a value for n: ');
m = zeros(n);
for column = 1:1:n
for row = 1:1:n
num = row*column;
m(column,row) = num;
end
end
iwant = zeros(n+1,n+1) ;
iwant(2:end,1) = 1:n ;
iwant(1,2:end) = 1:n ;
iwant(2:end,2:end) = m ;
iwant = num2str(iwant) ;
iwant(1,1) = 'X' ;
disp(iwant)
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More Answers (1)
Stephen23
on 6 Jun 2018
Edited: Stephen23
on 6 Jun 2018
No loops are required, just use MATLAB's ability to work with complete matrices:
n = str2double(input('Select a value for n: ','s')); % safer to use 's' option.
v = 1:n;
m = [v;v(:)*v];
f = repmat('%5d',1,n);
fprintf(['x |',f,'\n'],v)
fprintf('--|%s\n',repmat('-',1,n*5))
fprintf(['%-2d|',f,'\n'],m)
Which displays this in the command window:
Select a value for n: 6
x | 1 2 3 4 5 6
--|------------------------------
1 | 1 2 3 4 5 6
2 | 2 4 6 8 10 12
3 | 3 6 9 12 15 18
4 | 4 8 12 16 20 24
5 | 5 10 15 20 25 30
6 | 6 12 18 24 30 36
If you want to put headers in a variable stored in MATLAB memory, then I highly recommend using tables:
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