## Find max/min from implicit function...

Hi,

I'm trying to optimize parameters in a implicit function. I can create a plot of the function using implicitplot. But I now need to find the maximum and minimum in a given range. How to do this.

## cubic equations and odd percent signs...

I have been searching for quite sometime, but I cannot find an answer to this.  So at last, I'm posting.

I keep trying to solve this equation below, and this is the outcome I get.  And, I have no idea what the solution means.  I am largely confused by the percentage signs, periods, etc...

-kD

## Using plot in routine...

Hi,

I have to filter a load of analysis data and have written the following

## Plotting area defined in polar coords...

We have an area defined in polar coordinates by

r = 1..3 and theta = 0..3*Pi /4

, and we wish to plot it in maple. Such a simple thing should be possible, but it seems impossible with implicitplot and polarplot.

Unfortunately, this exact maple plot is required for an assignment tuesday, so we would like some help

Sorry because I can not good speak English. I want to draw a graph with maple 10.

I want to draw a polar contour. I have some datas in a txt file. I want to read data and plot graphic. My datas have 3 colums. first column is radius (r) ,second column is angle (theta) ,third column is my fuction z. z=f(r,theta).

I do readdata and my datas reading. But I not drawing a contour graphics.

How do I to solve this problem?

## decimal issue (Digits)...

It's probably a simple issue but I can't figure it out

If I do 3/(4.)  I get .7500000000 .  Why doesn't maple drop the zeros?

Is there a default so that when I divide a fraction like 3/8 or 1/4 and get .375 and .25 without the extra zeros?  or is it always standard for maple to tack on those extra zeros?

Sorry because I can not good speak English. I want to draw a graph with maple 10.

I want to draw a polar contour. I have some datas in a txt file. I want to read data and plot graphic. My datas have 3 colums. first column is radius (r) ,second column is angle (theta) ,third column is my fuction z. z=f(r,theta).

I do readdata and my datas reading. But I not drawing a contour graphics.

How do I to solve this problem?

## toolbox Maps...

1. The toolbox "Maps" within the Maplesheet "Introduction to the mathematics of maps" is not loading.

2. The code maple.lib is stored in a directory c:/maps

3. The toolbox maps is refered to as:  libname:= libname,  "c:/maptools", "c:/maps";

Maple returns:    libname := "C:\\Program Files\\Maple 10/lib", "c:/maptools", "c:/maps"

4. The maptools is opening fine, but not the maps toolbox.

## e^x expression form in solution instead of sinh...

Hi,

I opened an older worksheet (from version 9 I think) and opened it in version 10. In the new version it produces different results.

In version 9 the solution found with the solve function included sinh and cosh terms. The new version uses their exponential forms. The expressions are now much bigger, but are probably the same in effect. However I would like to get the Maple9 behavior for this solution.

I have tried the convert (function,trigh) but that didn't result in the clean function I got in earlier version.

Any ideas?

M.

## Choose an interval?...

Hi!

I want to set up a question where students first should do some calculation (p-values actually). Next step would be to see if this value is an element of intervals given by me. It seems reasonable to attempt constructing a multiple choice question, but there could be alternatives. In the case of a MC, the alternatives could be like the following:

1. <0.005

2. 0.005-0.01

3. 0.01-0.02

4. 0.02-0.025

5. 0.025-0.05

6. 0.05-0.10

7. 0.10-0.15

8. >0.15

## Fit Curve with Error Calc...

Hi there :) I often need to plot datapoints, and then fit a curve in then. So far i did this with the [i]ScatterPlot[/i] command, and moddeled the function to the data with the Fit or Nonlinearfit command. In most cases this worked really great, but i would need some extras: ;) As far as i have noticed the Fit is only based on the datappoints. The Fitfunction doesn't seem to take care of x- or y-errors, drawed in with the data. So: Is there a way to take care of the x- and y-errors in the Fitting process? If yes, how?

## Break...

When I right-click on a 387x387 Matrix my pointer turns into a processing indicator and the system sits endlessly.  Other than killing the maple server process is there a way I can instruct Maple to cancel processing and make it responsive again?

## Phase diagram with k(dot) and k...

hi, I was wondering how I can plot a phasediagram for the Solow growth model which has k(dot) on the y-axis and k on the x-axis and that has arrows that point in the right direction above k(dot)=0 and arrows that point in the left direction below k(dot)=0 The code I use to plot k(dot) is: restart: y:=A*k^a: S:=s*y: BE:=(n+g+d)*k: k_dot:=S-BE; s:=0.7: A:=1: a:=0.3: n:=0.06: g:=0.04: d:=0.03: plot(k_dot,k=0..15,color=blue, labels=["k", "k_dot"]); works fine but I am missing the arrows....

Cheers!

You will find in the attach file work that I have done in this subject.  Everything works fine when the calculation is around x=0.  But if for example I want to do it near x=4, I don't come near the value that Maple give me.  But the plot loook OK.

Is it the definition of px and qx in the file that I don't define correctly?

By the way, if you know a simple application on that subject (simple), I will be glad to learn about it

## how to assume nonzero constant...

Hi,

Is there something like

assume(a,'nonzero');

how could i tell maple that

a

is a nonzero constant?

Thanks

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