### User Activity

• Posted a comment on discussion Open Discussion on wxMaxima

What you're expecting isn't correct. a/abs(a) is plus or minus 1, if a is real. If a is complex, it is a/sqrt(a*conjugate(a)). You're forgetting that a can be any kind of number, as far as Maxima is concerned. You have know what you are trying to do to get Maxima to do it. If you know that a is real and positive, then use assume(a>0).

• Posted a comment on discussion Open Discussion on wxMaxima

You want to make the first argument to makelist a bit more complicated, like this: N:10\$ /* one less than the number of steps you want */ makelist(float(-10+k*20/N),k,0,N);

• Posted a comment on discussion Open Discussion on wxMaxima

I just told you how to do it.

• Modified a comment on discussion Open Discussion on wxMaxima

This is not correct: the del's indicate differentials, not partial derivatives. Also, the arithmetic operators are not correct in the given expression. Make sure to include * every time two numbers or symbols are multiplied. Do it like this: /* define the function */ f:z^3-3*x^2*y+6*x*y*z; /* total differential of f: coefficients of del's are partial derivatives */ diff(f); /* another way to do the same thing as above */ del(f); ev(%,eval,diff); /* partials of f with respect to x, y, and z, respectively...

• Posted a comment on discussion Open Discussion on wxMaxima

This is not correct: the del's indicate differentials, not partial derivatives. Also, the arithmetic operators are not correct in the given expression. Make sure to include * every time two numbers or symbols are multiplied. Do it like this: /* define the function */ f:z^3-3*x^2*y+6*x*y*z; /* total differential of f: coefficients of del's are partial derivatives */ diff(f); /* another way to do the same thing as above */ del(f); ev(%,eval,diff); /* partials of f with respect to x, y, and z, respectively...

• Posted a comment on discussion Open Discussion on wxMaxima

Unfortunately, 16.12.2 caused a weird problem with my graphics: on Linux Mint 17.3...

• Posted a comment on discussion Open Discussion on wxMaxima

I'm using wxMaxima built from git source, and floating point numbers all have [x...

• Posted a comment on discussion Open Discussion on wxMaxima

You have to be more careful. You lost the division operator in your definion of z....

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jpcusumano
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2009-12-18 13:28:36

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