How I can make a function projection (A,B)?

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Sara Jam
Sara Jam 2017-3-12
评论： Jan 2017-3-13
For example i would to project vector A to B.
  1 个评论
Jan
Jan 2017-3-12
To me this sound like a homework question. Then please post, what you have tried so far.

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Jan
Jan 2017-3-12
编辑：Jan 2017-3-13
The projection of a vector A onto a vector B has the same direction as the vector B, but a different length. When both are parallel, the length of A is not changed. When A and B are orthogonal, the resultung vector vanishes. You need the dot product to calculate this. The details are explained e.g. at Wiki: vector projection.
Please try this and post what you have done so far. If you have a specific question, you will get assistance here.
  2 个评论
Sara Jam
Sara Jam 2017-3-12
编辑：Jan 2017-3-13
I made the function
P= projecton(A,B);
P= (dot(A,B)/norm(B)^2)*B
end
Is it correct ?
Jan
Jan 2017-3-13
A function must start with the keyword "function":
function P = projection(A, B)
Then I'd insert a semicolon after the calculation to suppress the output to the command window. The calculations are correct.

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