I've been trying to evaluate another integral, like exp(-(alpha*x)^2) from 0, to infinity;

However it expresses the answer as a limit of some function(alpha), how do I get the integral to come out more exactly?

Thanks

Hello,
I have to find the internal of
E_field := conjugate((-.7147663039-.8729430992*I)*exp((9.123185068*I)*cos(phi))*cos(phi)+(0.3187576278e-1+0.3371906130e-1*I)*sin(phi)*exp((4.561592534*I)*(-1.*sin(phi)+cos(phi)))+(0.7062621752e-1+.1302618973*I)*cos(phi)*exp((2.000000000*10^(-11)*I)*(53.*cos(phi)+1.570796328*10^11))+(-0.3187599160e-1-0.3371906130e-1*I)*sin(phi)*exp((4.561592534*I)*(sin(phi)+cos(phi))))*sin(phi):

I try to solve by
evalf(simpson(E_field, phi = 0..2*Pi));

Some Posts and Questions contain broken links to files uploaded in the "old Mapleprimes". We've heard that some files (eg. image files) may be irretrievably gone.

But here is a curious page. It had an associated .mw worksheet uploaded. And the link to the uploaded .mw is now broken/stale, at the moment that I write this. But the link to view it with the maplenet viewer, in one's browser, still works. Not only that, but the .mw worksheet can be saved from within that viewer (via a URL distinct from the broken link on the Post).

How does one read in files with incremental names?

I have

for i from 1 to 10 do
   a||i:=readdata(`c:/test/i.txt`,string,7): 
end do:

I don't know how to escape the i out of the quotes so it can be used in the loop. 

I was trying to evaluate a 2-dimensional integral, but my answer contained an expression like pi/pi^2;  even trying to simplify this did not reduce the fraction properly. Why does this happen, and how can I get it to display the answer properly?

Thanks

The MRB constant is the upper limit point of the sequence of partial sums defined by s(n)= .

Each summand is a real number. However, the function f(n)= is a complex-valued function of a real number, n. This blog is a break in progression of the MRB constant series for the purpose of looking at the "complex" nature of this function. The function can be written in exponential form, .

With this first post I would like to demonstrate, in a Maple document, what happens to f [-2,0). When put together (-1,0) these graphs seem to be describing a hyperbolic spiral. I'm not sure if I'll have more to say, or not. As always, others are welcome to join in.

Download f6142010.mw

It seems that links to files in the old forum do not work,

for example http://www.mapleprimes.com/files/102_Garch.mws

This is the link as seen in http://www.mapleprimes.com/posts/38093-Financial-Numerics-Estimating-Garch11

Or otherway asked: where do I find my files (as former user no. 102)?

Hey everyone,

I've been using nonisomorphicgraphs for a while now, and my professor would really like to know if there is a pattern in the order in which it spits out the graphs. I've noticed that they pair them up in complements of each other(or as close as possible), but has anyone found the order in which they come out, and what the reason for this order is?

A recent announcement: ViennaCL, an OpenCL (GPU) based linear algebra library.

It would be interesting to see how it might be used from within Maple via external_calling (even if only for some simple examples).

I got two columns of data in excel: current (I) and voltage (V). What i want to do the following things:

1. read the data set into Maple 12.

2. plot the current vs voltage

3. Fit the plot to the function with polynomial form:  I=aV^2+bV

4. find the R-squared value of the fitted function.

Could anyone kindly tell me the detailed code to achieve this, thanks a million.

A method of fitting a curve to data points so as to minimize the sum of the squares of the distances of the points from the curve.
For example (yei,x1i,x2i,x3i,x4i) is experimental data and relevant function is y=f (x1,x2,x3,x4), some unnkown parameters

(a1,a2,a3,a4) can be solved by minimizing the sum of squares of residues.
Procedure is:
ry:=(yei-y)^2;
Tr:=sum(f, i = k .. n);
da1:=diff(Tr, a1);da2:=diff(Tr, a2);da3:=diff(Tr, a3);da4:=diff(Tr, a4);

Hello.

I was wondering if it is possible to plot a heat distribution within a thin square plate in Maple knowing the temperature as a function of the coordinates in the plate? The result would be a plot with, for example, red representing the hotter regions and blue representing the colder regions.

Thanks in advance.

when I do the integration

>int(exp(-I*x*p),x=-infinity..infinity)

the result  obtained is  "undefined  "

but, actually it equals  Dirac(p). How can I get this result?  I badly need this.

well,it's the Fourier transformation of the constant function 1, but I don't want to use the internal function fourier();

Thank you!

Hello! Excuse me for my English!

I am student. How can I evaluate the integral numerically?

Maple can't compute:

evalf(Int(sin(x^19),x=0..10))

I think, that the problem is in the oscillating function.

Maybe, I have to change some options?