## 120 Reputation

18 years, 22 days

## Amazing Maple!...

Wow~ The way Maple handles the symbols is just amazing!!! Really appreciated for dedicated replies!

## Can I sort the numbers under assumption?...

We just found how to find max and min. What about sort? Can we sort the numbers in "a" variable? Using an array of "a" variable.. (ie. a[0], a[1] ...) Thanks,

## Can I sort the numbers under assumption?...

We just found how to find max and min. What about sort? Can we sort the numbers in "a" variable? Using an array of "a" variable.. (ie. a[0], a[1] ...) Thanks,

## Facing an error with array usage?...

I modified the above code to use an array little bit: a[1]:=w1+w2-w3: a[2]:=-w1+2*w2: a[3]:=2*w1-w2-2*w3: a[4]:=-w1+w2-w3: a[5]:=-w1+w2+w3: b:=w3>w2,w2>w1,w1>0,w2-w1>w3-w2: max(a) assuming b I faced the following error: ;Error, (in assuming) when calling 'simpl/max'. Received: 'arguments must be of type algebraic' Any suggestion? Thanks,

## Facing an error with array usage?...

I modified the above code to use an array little bit: a[1]:=w1+w2-w3: a[2]:=-w1+2*w2: a[3]:=2*w1-w2-2*w3: a[4]:=-w1+w2-w3: a[5]:=-w1+w2+w3: b:=w3>w2,w2>w1,w1>0,w2-w1>w3-w2: max(a) assuming b I faced the following error: ;Error, (in assuming) when calling 'simpl/max'. Received: 'arguments must be of type algebraic' Any suggestion? Thanks,

## How can I plot positive side only? and s...

Hi Alec, From the above example, After FourierTransform, w has both positive and negative sides. f:=(2*cos(t)+1.5*cos(3*t)+3*cos(4*t))/Pi: How can I plot positive side w only? Which means...w1 = 1, w2 = 3, w3 = 4 with amplitude of 2, 1.5, and 3 accordingly. Also, In plots, how can I specify frame and numpoints? Here is an example from you. http://beta.mapleprimes.com/forum/plotting-the-dirac-function In the case, you specified the framed and numpoints... plot([s,0], t=0..3000/fc, title="AM Waveform (fm = 4kHz)", titlefont=[HELVETICA,16], font=[HELVETICA,12], labels=["Time (s)", "Amplitude"], labeldirections=[HORIZONTAL,VERTICAL], color=[red,black], axes=framed, numpoints=500); S := inttrans[fourier](s,t,f); Thanks,

## How can I plot positive side only? and s...

Hi Alec, From the above example, After FourierTransform, w has both positive and negative sides. f:=(2*cos(t)+1.5*cos(3*t)+3*cos(4*t))/Pi: How can I plot positive side w only? Which means...w1 = 1, w2 = 3, w3 = 4 with amplitude of 2, 1.5, and 3 accordingly. Also, In plots, how can I specify frame and numpoints? Here is an example from you. http://beta.mapleprimes.com/forum/plotting-the-dirac-function In the case, you specified the framed and numpoints... plot([s,0], t=0..3000/fc, title="AM Waveform (fm = 4kHz)", titlefont=[HELVETICA,16], font=[HELVETICA,12], labels=["Time (s)", "Amplitude"], labeldirections=[HORIZONTAL,VERTICAL], color=[red,black], axes=framed, numpoints=500); S := inttrans[fourier](s,t,f); Thanks,

## Seems I need more exercise :)...

Thanks for the advice! Seems I need more exercise with the Math tools :-)

## Seems I need more exercise :)...

Thanks for the advice! Seems I need more exercise with the Math tools :-)

## Got it! Mathemetica evaluation is differ...

Thanks for the guide! In Mathematica, I typed the following expression. Cos(w1 t)/Cos(1) Then it gives me w1 In Maple format, I typed cos(w1 t)/cos(1) Then it give me cos(w1 t)/cos(1) Why is it different? How can I have the same result in Maple? Is there other ways to extract frequency domains? i.e) cos(w1*t+w2*t) I want to save w1+w2 into an array to post-processing. Thanks!

## Got it! Mathemetica evaluation is differ...

Thanks for the guide! In Mathematica, I typed the following expression. Cos(w1 t)/Cos(1) Then it gives me w1 In Maple format, I typed cos(w1 t)/cos(1) Then it give me cos(w1 t)/cos(1) Why is it different? How can I have the same result in Maple? Is there other ways to extract frequency domains? i.e) cos(w1*t+w2*t) I want to save w1+w2 into an array to post-processing. Thanks!

## Thanks for the usuful tips! Reference bo...

Thanks for the comment! By the way, do you know good reference books to learn Maple? Particulary in communication area.

## Thanks for the usuful tips! Reference bo...

Thanks for the comment! By the way, do you know good reference books to learn Maple? Particulary in communication area.

## "op" statement in plottools makes me ver...

Can you explain the "op" statement in more easy ways? or any helpgul websites?? Thanks,

## "op" statement in plottools makes me ver...

Can you explain the "op" statement in more easy ways? or any helpgul websites?? Thanks,
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