Dirk

Hi, there were already some topics about labeling plots but I have still a question:

I would like to label my axis with e.g.: rho [kg/m^3]. roh should be displayed symbolic (2D output) as well as m^3. On the other hand I would like to avoid that Maple builds a (2D) fraction with kg/m^2. Does anybody know how to do this?

The other thing: Is it possible to add an legend to a 3D plot?

Thanks!

I have calculated data in form of a matrix. The corresponding x- and y-values are given in two lists (see attached file).

Now I would like to export the data to a textfile to use it in another program. The problem is, that I need the following format (name_listA[i]_listB[j]= is a text string where the corresponding x- and y-values are integrated)(values[i,j] is the number out of the matrix):

name_listA[1]_listB[1]= values [1,1]

name_listA[1]_listB[2]= values [1,2]

etc....

Is it possible to import the content of textfiles(*.txt) directly into Maple11?

Most analytical and simulations tools I use provide textfiles as output. To import them into Maple11 I have to import them into an Excel file first and from there finally into Maple. That is not very effective...

Does anybody know how to solve the attached quation analytically for rho? The solve command fails.

(Solving numerically and plotting with implicitplot3d works well.)

View 6629_maple1.mw on MapleNet or Download 6629_maple1.mw
View file details

For certain points I have determined values: z depending on x and y. I look for a method to get extrapolated values for any x-y combination in this area.

To fit a 3D curve is not feasible because the fitted curve would not deliver the exact z values for a given data set (=essential condition). For a 2D data set I would do something like a linear regression between two data points but I have no approach to do something similar with data points depending on two variables. I hope somebody can help me to solve this problem. Thanks!

Maple generates the values (numbers) for axis labeling automatically, e. g. 3.5   10E-3 for 3.5 meters. If I want to label the axis manually with millimeters, how can I fit the automatically generated numers to the manual given unit?

I have a problem and hope, anybody can help me with that.

I have density data dependig on temperature and pressure. The data are stored in an excel file (in a square block - see attachment). Is there an easy way to import this data in Maple, that I can use several values of the density at given a pressure and temperature? Maybe comparable with a table (or matrix) where you can pick out indexed values, e.g. rho[temperature,pressure].

My current solution is to write a procedure, but before that I would like to know if there is an easyer way.

Hi,

I tried to get a 3D "surface" plot (comapreable to a matrix surface plot or matrixplot) of a list in the form:

[[xi,yi,zi],....]

where xi are the x-data, yi are the y-data and zi are some velocity data. Unfortunately I found only the possibility to draw a pointplot3d. Maybe anybody can help me.

Thanks

Dirk

Hi,

I have just another question. I would like to create a high resolution jpg file of a 3D plot, but I get only pictures in a very bad quality (even by using the plotpoints command).

How can I enhance the quality of exported picture files?

Thanks,

Dirk

Hi,

I have some numerical data (-> data2.txt) for a velocity profile (x- and y- coordinate with corresponding velocity). I would like to compare this data with a analytical function (3D plot -> Maple file).

Do anybody know, how

#1 to get the data - points in the 3D plot and

#2 how to determine the error between the data - points and the 3D plot?

Thanks,

Dirk

Hi,

I have some data (points of results -> a list of x - data and a list of corresponding y - data) and I would like to fit a curve to this data.  curves does not fit very well to the data points.

Can anybody give me a method to fit a curve to the data?

Tanks!

The data are:

Hello,

in areas with strong slopes the accuracy of 3-D plots is quite poor.

E. g. is in the following plot the area with the strong slope displayed angular (also dependig on the perspective).

plot3d(0.2387865921e-3*Pi*sqrt(2)*(1/(Pi*T))^(3/2)*v^2*exp(-0.1924464758e-2*v^2/T), v = 0 .. 1000, T = 0 .. 500, axes = boxed);

Is it possible to enhance the quality (resolution) of a plot in this reginons (or in the whole plot)?

Thanks,

Dirk