How to use for Loop and if statement to construct a Pythagorean triple function?

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NIANNIAN 2014-11-13

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评论： NIANNIAN 2014-11-13

I am working on construct a Pythagorean triple functions with inputs (a,b,c). Function: a^2+b^2=c^2

I am confused when the Matlab reminds me of NOT ENOUGH INPUT ARGUMENT. Should I initialize a,b,c? Besides I need use loop and if statement to check a,b,and c are all positive.

This is what I have written:

function [ Pyth] = isPythag( a,b,c )

d =a.^2+b.^2-c.^2; [row,column]=size(d);

for i=1:row for j=1:column if (d(i,j)==0) pyth(i,j)=1; else pyth(i,j)=0; end end end end

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Answer 1

Adam 2014-11-13

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编辑：Adam 2014-11-13

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Is the aim of your function simply to determine whether a, b, and c form a Pythagorean triple?

If so then yes you need to intialise them and pass 3 arguments to your isPythag function...e.g.

isPythag( 3, 4, 5 ) % True
isPythag( 4, 5, 6 ) % False

You don't need a for loop though unless you intend to pass in vectors of a, b and c and even then you can vectorise rather than use a for loop to give multiple answers.

You also need to be consistent with capitalisation or not of variable names.

'pyth' is a different variable to the 'Pyth' output variable your function expects.