Symbolic collect and display

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Ole 2019-8-31

评论： Star Strider 2019-8-31

I would lie to display the coefficients before the expansion terms of the cos one by one.

syms x y
f = expand(sin(x + 3*y));
coeffs_cosy = collect(f, cos(y))

How can the terms before the cos^n be displayed one by one?

This is short but for more complicated expressions, several dimensions the taylor series output text that cannot be displayed.

Star Strider 2019-8-31

I am not certain what result you want.

Try this:

[cfs,trm] = coeffs(coeffs_cosy, cos(y))

producing:

cfs =
[ 4*sin(x), 4*cos(x)*sin(y), -3*sin(x), -cos(x)*sin(y)]
 
trm =
[ cos(y)^3, cos(y)^2, cos(y), 1]

Experiment with the coeffs arguments to get the result you want.

Ole 2019-8-31

Thank you.

Star Strider 2019-8-31

As always, my pleasure!

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