## ploting...

i have this code: S := []; for i from 0 by 5 to 150 do S:=[op(S),[i,(i+3)^2 mod 7]]; end do; plot(S, style = point) i want to plot points connected by lines. how do i do this?

## urgent regarding missing values...

hi everyone , please help me to sort out this problem ... suppose i have a matrix 1 2 3 ? 2 ? 2 1 6 where ? are unknown values . what i want to do is to "Fill in the missing values by the respective attribute means. " How i will do it matlab? please help me as soon as possible ...

## Arrays...

What's the difference between Arrays and Matrices, according to Maple10 ?

## Change the definition of built-in functions...

I have been experimenting with overloading existing Maple functions by creating an appropriate package, as described in the "overload" help. It works fine in general. I was hoping to change the definition of `abs` on type Vector to be sqrt(V . V) in this way, but the change does not work because `abs` already has an alternative definition on this datatype and it seems that built in functions take precedence over overload versions that one has added. Is there any way of achieving this? Grateful for any pointers.

## How to set font and background color?---ask for he...

Maple usually has white background and red font. How to set font black and background color in light grey? Should I use "Format"--"Styles"? But why each time when I build new file I lost the previous style setting?

## weights in Statistics[NonlinearFit]...

weights in Statistics[NonlinearFit] within M10:

what does that do exactly - stupid me can not find from the help
saying "weights = Vector -- Provide weights for the data points"
Does that mean the points are weighted (i e the count multiple)
or does it do (fct(x_i) - approx(x_i) )^2 / weight_i or what?

## do not show tilde for assumptions...

If i save a sheet in M10 and open it then it shows tildes
dispite having interface( showassumed = 0 ) in my ini file.
In M9.5 that was ok (using WIN ME in both cases, classical
interface of course ... and having asumptions in the sheet)

How this ugly behaviour can be avoided?

## Definite Integration...

Hi, guys could you please let me know how I can find this definite integral through Maple? int(exp(-I*x)/cosh(x)^3,x=-infinity..infinity); or int(exp(-I*x)/cosh(x)^2,x=-infinity..infinity); thanks a lot Sayed

## Problems with matrices...

Trying to calculate the determinant of matrix A i have to add extra details to the function (integer) to get result (for example): Det(A) - does not work for me, but - Det(A) mod 10000 (or 10^n); - does and gives the result (honestly it took me a while to get it clear, i mean to get Det(A) work). I think it's not the way it is supposed to work. In help it's simply clarified that Det(A) function should give the result of determinant of matrix A, without any additional integers like mod :/. I can't figure out this riddle.. (i've started using maple 3weeks ago, and mostly for algebra and geometry). Any help pls? Do i have to change any settings? Tnx, in advance =).

Hi, does anyone know if it is possible to use maple to handle equations involving differential forms (antisymmetric tensors). Basically i have a set of equations that involve forms of various degrees, with some indices contracted with vectors etc. Now most of the components of the forms are zero, but the equations are still very tedious to handle by hand. It would be useful if i could input the equation into maple, tell it all the various non-zero form components, and then let maple substitute the components into the equation. Naturally i would need to specify the values of the free indices in the equation, so that the tensor equation reduses to a standard equation. And presumably Maple would need to understand the einstein summation convention etc.

## Convert 1 + 0.I to 1...

What is the proper method for converting an extended numeric with a zero imaginary component to a real? It should leave the complex part alone if it is not zero. That is, somefunc(1.0 + 0.*I); 1.0 somefunc(1.0 + 1.*I); 1.0 + 1.*I I can write my own procedure, but there must be standard way (somefunc) to do this. Searching the help browser didn't help. Thanks.

## sending multiple mails...

I want to know how to send mails to multiple email addresses using PHP code. Thanks. http://www.hytechpro.com