## Can I reverse the directions of plot axes in Maple...

As a geotechnical engineer, much of what I calculate relates to depth or settlement.  Which, by tradition, is signed as positive in the vertically down direction.  Hence, I want to be able to produce graphs with positive y-values (e.g. depth, settlement, etc.) plotted in the downward direction (effectively, all I want to do is simply reverse the direction of the y-axis).  One workaround is to simply multiply all y values by -1 before plotting.  But this isn't ideal (as the values show as negative).  I've had a look through the documentation and haven't found a clean way of doing this.  Is anyone able to confirm whether its possible?  Or am I wasting my time looking?  Thanks in anticipation, Ian

## How are units used in plots?...

I tried to generate a simple plot based on an expression using units. Please see the screenshot of the worksheet below

The y-axis should be scaled in m3 not m2 because a, b and the variable r are in m. I know that it is possible to enforce the axis scaling in units using useunits but since the mathematical definition of the expression is clear this should not be necessary.

The other question is why is the y-axis missing the variable name? On this page on the Online Help http://www.maplesoft.com/support/help/Maple/view.aspx?path=MaplePortal/UnitsInPlots it is mentioned "When you plot an expression, the axes labeling shows the variable names and units." I think what I am plotting is an expression.

## Plotting 2-D Graphs...

Dear All

I have simple problem related to ploting of 2-D graph

What I need is listed as below:

1. How I can re-scale axes by 1/2.

2. How to give custom gap between graph and its title.

3. How to place two legends in vertical format in opposite to horizontal.

4. How to assigne custom gap between legends and graph

5. How to place label 'q[b]' on the right side of vertical axes.

 >
 (1)
 >
 (2)
 >

Regards

## Everything is too small...

Hi

Hope somebody can help me! I installed Maple on my computer, but everything is very small , for example the bar in the top with all the small icons. It is the same thing when I make plots. The values on the axes are very small. How can I change this?

I have taken a photo of the problem, don't know if it helps.

## Maple equivalent to the "linkaxes" command of Matl...

How can I link the axes in two or more separate plots so that when I zoom in one, the others are also zoomed. Also when I want to link the 'x' or the 'y' axis only.

Thank you

## space between axes and plot in listdensityplot...

Consider a plot generaged by:

export_plot_options:=font=[TIMES, roman, 30], axis=[thickness=4, location=low], size=[850,850]:
points := [seq([seq(exp(-(x^2+y^2)*(1/100)), x = -10.0 .. 10.0)], y = -10.0 .. 10.0)]:
plots:-listdensityplot(points, export_plot_options);

How can one get rid of white space between the axes and the actual data??

thanks

## Problem of plot detail in maple 15...

Hi,I'm using Maple 15. When I plot with the command

Aplot:= Plot2D(Q[2 .. 26, 13], Q[2 .. 26, 14], style = point, color = blue, symbol = solidcircle, symbolsize = 16, font = [Arial, Bold, 13], axes = box, axis = [thickness = 1, tickmarks = [5, subticks = 5]]);

There is the report of problem

Error, (in plot/options2d) unexpected axis suboption: thickness = 1

Thank you for helping me.

## Density plot with arbitrary scales?...

I have a Matrix of data points I am plotting using plots:-listdensityplot. That works fine.

However, the axes are labeled by row and column number of the Matrix (e.g. 1..20 or whatever). In reality, these are of course some parameters the range of which has been mapped onto the rows and columns of the Matrix.

How can I display the axes using the values of the original parameters? I know the transformation from Matrix row or column to the actual parameters (and in this case it is linear).

TIA,

Mac Dude

## How to plot an ellipse?...

Hello everyone!

I used Maple 17 to fit an ellipse to a set of points using the following guide:

http://www.maplesoft.com/applications/view.aspx?SID=1395&view=html

My rotated ellipse was calculated to be:

SOL;

0.3939708949 x^2 - 0.005975799853 + 0.6345432059 y^2

But everytime I try to graph it in Maple 17, it only shows the axes and nothing else. Any help would be extremely appreciated.

## How to create a plot with two x-axes ...

Hi,

I tried to create a graph with two different x-axes and y-axes, for example:

It's no doubt that we can use the "dualaxisplot" to generated a plot with two different y-axes as follows:

It's seem that Maple can realize plots with two different x-axes , because some of cases present functions through upper x-axis, such as:

How should I create a graph to display functions using the bottom and left sides as the x- and y-axis for one, and the top and right sides as the x- and y-axis for the other?

I'd appreciate any help on this topic. Thank a lot.

## 3-D Cube in Maple...

Hello,

I am trying to make a three dimensional cube in maple by using matrices. I also have to make it rotate about the x,y,z axes, project it with three different origins, and translate it (I'm assuming this means translate it across an axis?). I have already made the cube, but when I try to rotate it across one of the axes by multiplying my matrix by one of the rotation matrices (this is what I put un maple: P1:= matrix([[1,0,0,0],[0,cos(theta),-sin(theta),0],[0,sin(theta),cos(theta),0...

## sketching in MapleTA using Latex...

I'm using Latex to write sketching questions. Although it works well for me, and it is quite easy, there are a couple of things I want to do and couldn't:

1 - having the axes with different lenghts: the sketch area is always shown as a square, even when the axes have different lengths. I want to have a longer x axis, keeping the units proportional in both axes.

2 - having an image in the background of the skecth area.

## x axis label rotation

Maple

Just a small digression.  It would be nice if the numbers on the x-axis could be rotated or angled so it does not look like they collide with each other.  When the numbers reach the 100's or 1000's there will be congestion.

This is perhaps a suggestion for a future Maple version as the current versions do not support number rotations on the axis.

## thickening 2D plot axes

by: Maple 15

It is possible to thicken the axes of 2D plots by adjusting the underlying data structure, since the appropriately placed THICKNESS() call within the PLOT() data structure is recognized by the Standard GUI. This does not seem to be recognized for PLOT3D structures, however.

The issue of obtaining thicker axes for 2D plots can then be resolved by first creating a plot, and then subsequently modifying the PLOT structure.

The same techniques could be used to thin...

## Identify a Tangent Line...

How to solve this problem in maple?
Decide which of three lines given are tangent to the graph of f(x) at given points.
The function to define is f(x)=2x^3-4x^2+3x-5
The possible tangent lines are:
y = x - 5
y = 2x - 5
y = 3x - 5

1. What is/are the zero(es) for this function? In other words, what is the solution for f(x)= 0

2.  What axes values (x- and y- ranges) are appropriate for this graph?

3. When plotting each linear function with f(x...

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