Dear Maple users

I have done some experiments with the new Workbook feature in Maple 2016. It is a very welcome addition, indeed. Earlier I have created Maple files in which data from an external Excel file was imported and being used for certain calculations. In order to make recalculations work properly, one need to let the Excel file follow the Maple file. That's where a Workbook come in handy! I tried placing those two files in a Workbook. It didn't work completely as advertised, I think. I moved the Workbook to another location on the harddrive to make sure it wouldn't interfere with the original files outside the Workbook. Then I recalculated the Maple document inside the Workbook. The good thing: The data from the Excel file was still present. The bad thing: If I changed some data in the Excel file inside the Workbook, it didn't register in the Maple file when updating it!

Maybe I should explain that I did import data from the Excel file into Maple via the menu: Tools > Assistants > Import Data... The data was retrieved as a matrix within the Maple file and assigned to a variable and used for plots ...

Why doesn't the above procedure work properly? I hope one don't need to use the Workbook URI to reference files within the workbook. It is not that userfriendly!

Regards,

Erik

Dear Maple users

I wanted to use the zip-command to muliply two lists with units. It works without units, but not with units:

If I add units to each entrance it works too, but not very convenient. How is it done with units in the best way?

Regards,

Erik

Dear Maple users

In order to solve a problem in Biology, I have come across four equations with three unknowns, making it overdetermined. The equation system does not have any specific solutions, but since the equations can be considered containing errors, I am looking after the best possible solution - which will minimize the coefficients in the original equation system. My question is twofold:

1. Does there exist a specific Mathematical Theory to handle non-linear equation systems of this type?

2. Which command in Maple can solve it?

Regards,

Erik

Dear Maple T.A. users

I have just begun using Maple T.A. I have access to a number of questions, some of which involves placing points in a coordinate system. It works for most students, but for a few, including myself, it doesn't work. I am not able to place those points in the coordinate system at hand when leftclicking. What can be the reason for this issue?

Erik

Dear Maple users

I know how to fit a function with some parameters to some data, but how can it be done if the data is 2-dimensional? I mean: I have some time array T, some X array and some Y array. How do I fit a function with certain parameters to the data: (x(t),y(t)) to fit (X(T), y(T)), ...

Erik