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I'm a very new beginner, and I have a question about getting the data of a curve from a JPG, without using manual measures an too getting more accurate datas.

I wish to fit the curve with a model. The JPG joined, from EU 2015, is about human thermoregulation. I still try to found a model with Mathematica but am uncertain seeing the result as illogic.

Did anyone write something to read curves from a JPG and get coordinates from these curves ? In the JPG, the curve is above, as an 'U'.

Thanks for your advice,


I have used data and the curve fitting procedure to find a curve and I now have to put error bars on the graph to complete my task? I know that there is an errorplot function but I cant seem to find a way to do it with the curvefitting thing?


I have attached the whole worksheet, I hope someone can help! Thanks


Even if there was some method of exporting the graph to another medium that would also be very helpful




I am pretty new to Maple and Im trying to find the parameters of an equation using some kind of fit routine but I can only find such a routine to fit an expression to data and not vice versa.

my equation is as follows


epsilon(E):= a0 + a1*ln(E) + a2*ln(E)^2 + a3*ln(E)^3


I do have data for E which I imagine I need. 


E:= {121, 244, 344, 411, 444, 778, 867, 964, 1085, 1112, 1212, 1299, 1408} all in keV :)


Any suggestions/help would be much appreciated, although I am new to the program so go easy on me :) 




Hi all

As you know  in Matlab many Maple Functions didn't define. One of that is   HeunT  function. Now I want to plot that in Matlab, I'm surfing in the net, Unfortunately I can't find it...!

Please help me to get all the data points from my Plot in Maple so that I could plot those in Matlab.

How would I organize the data so I get the value "a" with it's following value in the first two positions on each set?


I want to get


This is of course a smaller sample size of something larger.  Can someone help me?


Hi All,

I would like to create a 3D plot or surface plot and got stuck here and need your help.

I have a text file cretaed from C++ program. This file contains data in 8 columns. The first columns are X and Y values and rest of the columns are my calculated values based on X and Y. How can I visualize column numbers 3 to 8 based on X and Y values? Here is a sample:

0.00 0.00 0.378629 0.043703 0.259182 0.221199 0.181269 0.139292
1.00 0.50 0.151368 0.037717 0.451188 0.393469 0.329680 0.259182
2.00 1.00 0.034938 0.045672 0.593430 0.527633 0.451188 0.362372
3.00 1.50 0.003482 0.061922 0.698806 0.632121 0.550671 0.451188
4.00 2.00 0.000134 0.083040 0.776870 0.713495 0.632121 0.527633
5.00 2.50 0.000002 0.106675 0.834701 0.776870 0.698806 0.593430



While I am working with a problem , suddenly the message 'Kernel connection lost' appeared. After that I restarted maple and then I opened my work sheet again , but I lost all my equations and data in the work sheet. I dont know why? All my work is total empty. 

How can I recover the work sheet data? Solutions are appreciated.

I have attached the lost work sheet for your reference. 


Thanking you.



I have this data I want to import in to Maple.

In Maple I type:

ImportMatrix("C:\\Users\\marc\\Desktop\\data1.csv", delimiter = ",");

then I get the following:

My question now becomes how can I import the data with the correct dates and not just -Aug, 1-Aug etc ?
The method should also work when I have many more columns of dates.

Ps I cant upload the data on MaplePrimes since it is a csv file.

Hoe do you plot two vectors of data as a bar plot or historygram. I tried the statistics package but could not plot a bar plot that shows the proper relation of numbers in vector x to numbers in relation to vector y. Vector x contained years as data, and vector y contained for example crime data per year.

Hi, I solved some equations those days and get a group of data, namely, Data1. Then I want to get the function of the data, so I use the CurveFitting package of maple, and get the function easily (the function seems as a*x^3+b*x^2+c*x+d). But the function is not the one I really wanted, because it is hard to generate the complex curve (even the function is known) in some software. 

As I know, it is easily to generate some arcs in the software, so is there any way to fit a group of data with some piecewise of arcs?

 Best regards.

Data1:= [[.690499054221957, .109364306247567], [.679584570047867, 0.955093827253927e-1], [.668476295825779, 0.820785684569687e-1], [.657171143364362, 0.690714704619819e-1], [.645665768347822, 0.564884351571898e-1], [.633956566493958, 0.443305616055764e-1], [.622039668654294, 0.325997176601303e-1], [.609910934797136, 0.212985591645471e-1], [.597565946804089, 0.104305524003572e-1], [.585, 0], [.572208093323944, -0.998792942142104e-2], [.559184918035503, -0.195271676259796e-1], [.545924844835652, -0.286107087732754e-1], [.532421909264435, -0.372305667237386e-1], [.518669795218710, -0.453777271949494e-1], [.504661816411590, -0.530420942817277e-1], [.490390895570740, -0.602124307834357e-1], [.475849541144774, -0.668762917052363e-1], [.461029821255068, -0.730199502124052e-1]]


how to call matlab to run k means on the data and

how to show which circle do the row of data belong to?

I am trying to plot sequence like:



data:=[seq([n,arrayZ[n]], n=1..3000)]:
t1:=plot(data, style=point, symbol = solidcircle, color= red):

but get incorrect first argument error. How to fix this?

PS. In original sequence instead of null I have constant value, but I don't want it in my plot.


I am trying to find the inverse fourier transform given a vector (of real) as input. I get the following error message:

Error, (in DiscreteTransforms:-InverseFourierTransform) entries of input data must all evaluate to complex floats, got '[.7644453211]'

I am unable to understand this message. I would much appreciate help to resolve this issue.


In case anyone is interested, we recently posted a new application on the Application Center,

Time Series Analysis: Forecasting Average Global Temperatures

While interesting in itself (well, I think so, anyway), this application also provides tips and techniques for analyzing time series data in Maple, and shows how to access online data sets through the new data sets functionality in Maple 2015.


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