Why do we usually use M,N,P to indicate dimensions?
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taken to indicate the dimension of the array m, n, p. the meaning of these letters I guess that m - main n -??? p - page?
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Paulo Silva
2011 年 7 月 28 日
They are just variables when used like this:
[m,n,p] = size(rand(2,3,4))
m holds the first dimension (the number of rows)
n holds the second dimension (the number of columns)
p holds the third dimension of the array, think about it like the number of pages
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Paulo Silva
2011 年 7 月 28 日
just variables, no particular meaning, use the variables you like the most
Walter Roberson
2011 年 7 月 28 日
Historical habit in mathematics, just like using the beginning of the alphabet to represent constants and using the end of the alphabet to represent variables.
karthika
2011 年 7 月 28 日
m and p gives the number of rows and columns
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Walter Roberson
2011 年 7 月 28 日
No. The programming language doesn't care which variable name you use, but you will lose efficiency from people reading your code and attempting to figure out what your names mean. If you are going to use non-traditional names, use names that are self-explanatory.
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