Art Kalb

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12 years, 274 days

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These are replies submitted by Art Kalb

Hi,

 

I'm not sure what you mean by "you have not told yet which is your plot"?

 

Regards

 

 

 

Hi,

 

I'm not sure what you mean by "you have not told yet which is your plot"?

 

Regards

 

 

 

Hi,

Thanks for the explanation. Unfortunately, I get the following error message in the classic worksheet.

Warning, cannot create custom logarithmic axes with the inline driver.

It suggests I use the maplet - which of course is the Java implementation and appears to be equivalent to Standard worksheet.

Is this a known bug or does it need to be reported?

 

Art

 

Hi,

Thanks for the explanation. Unfortunately, I get the following error message in the classic worksheet.

Warning, cannot create custom logarithmic axes with the inline driver.

It suggests I use the maplet - which of course is the Java implementation and appears to be equivalent to Standard worksheet.

Is this a known bug or does it need to be reported?

 

Art

 

Hi,

 

I have been trying that to no avail. I keep getting output that is 540 pt  wide. Even when I get the width to scale up relative to the height, it is at the expense of the height. The width is always 540 pt.

Are you running Maple 12 or 11?

Regards.

 

 

Hi,

 

I have been trying that to no avail. I keep getting output that is 540 pt  wide. Even when I get the width to scale up relative to the height, it is at the expense of the height. The width is always 540 pt.

Are you running Maple 12 or 11?

Regards.

 

 

I'm trying to compute.

I'm trying to compute.

It looks equivalent to what I wanted.

 

It looks equivalent to what I wanted.

 

I was looking for a closed form expression.

 

 

I was looking for a closed form expression.

 

 

Hi.

Here is an example of what I am trying to do (a fourier series):

test := `assuming`([int((cos((2*Pi*6)*t/T)+t^2)*cos(2*Pi*n*t/T), t = -(1/2)*T .. (1/2)*T)], [T > 0]);

The result of this is:

1/4*T*(Pi^2*n^4*sin(Pi*n)*T^2+4*Pi^2*n^4*sin(Pi*n)+72*sin(Pi*n)*T^2-2*n^2*sin(Pi*n)*T^2+2*Pi*n^3*cos(Pi*n)*T^2-36*Pi^2*n^2*sin(Pi*n)*T^2-72*Pi*n*cos(Pi*n)*T^2)/Pi^3/n^3/(-36+n^2)

I then form the fourier series sum of these coefficients from 1 to N.

The coefficients are composed of two parts:

cos(2*Pi*t*t/T)  and  1/2*(-1)^n/n^2/Pi^2*T^3

I would like to write the fourier sum in the following form:

f(6) + sum of g(n) from 1 to N excluding 6

It's this second part I am having trouble generating when I don't want to specify N up front.

 

Art

 

 

Hi.

Here is an example of what I am trying to do (a fourier series):

test := `assuming`([int((cos((2*Pi*6)*t/T)+t^2)*cos(2*Pi*n*t/T), t = -(1/2)*T .. (1/2)*T)], [T > 0]);

The result of this is:

1/4*T*(Pi^2*n^4*sin(Pi*n)*T^2+4*Pi^2*n^4*sin(Pi*n)+72*sin(Pi*n)*T^2-2*n^2*sin(Pi*n)*T^2+2*Pi*n^3*cos(Pi*n)*T^2-36*Pi^2*n^2*sin(Pi*n)*T^2-72*Pi*n*cos(Pi*n)*T^2)/Pi^3/n^3/(-36+n^2)

I then form the fourier series sum of these coefficients from 1 to N.

The coefficients are composed of two parts:

cos(2*Pi*t*t/T)  and  1/2*(-1)^n/n^2/Pi^2*T^3

I would like to write the fourier sum in the following form:

f(6) + sum of g(n) from 1 to N excluding 6

It's this second part I am having trouble generating when I don't want to specify N up front.

 

Art

 

 

Hi,

This does not work if N is not bound to a number.

add(n,n=select(isprime,[$1..N])) generates an error

add(n,n=select(isprime([$1..10])) is o.k.

 

I would like something like the first option. Conversion of the add command to a sum is an invalid form for sum.

 

Any ideas?

 

 

 

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