MaplePrimes - answers and comments on Question, Entering reference values in tables

Spreadsheet

Carl Love — Thu, 28 Feb 2013 20:45:43 Z

Place your cursor in your worksheet in the spot that you want the table. Then from the Insert menu, select Spreadsheet. When you want to update the spreadsheet, right click in it and select Evaluate All. For programmatic access to spreadsheets, see ?Spread.

Embedded Component

Joe Riel — Thu, 28 Feb 2013 20:52:32 Z

Another option, possibly simpler, is to use a DataTable embedded component. From the Components palette, click the DataTable icon. A dialog will open querying for the size and name of the associated Matrix. You can directly access and assign elements in the DataTable via the associated Matrix. You can also change the row and column names by right-clicking on the embedded component and selecting the "Row Name" or "Column Name" items. The names are for display, access to the cells is via integer indices.

Thanks for the help both of you! The first

9colai — Thu, 28 Feb 2013 21:59:57 Z

Thanks for the help both of you!

The first solution worked out for me, i didnt fund any "update" option for Joe Riel's answer... Its like the numbers is constant after the reference is typed.

I wonder why the tables don't update automatically like the rest of the sheet when i press the execute button.

But it works now, and that's just perfect, thanks! :-)

Using the DataTable embedded component.

Joe Riel — Thu, 28 Feb 2013 22:28:49 Z

When you create the DataTable embedded component, the field titled "Assign to variable" should be modified to a desired name (the default is DataTable0). Say you change it to x, then click Ok. Now if you execute, in the worksheet,

x[1,2] := 23:

the cell in row 1, column 2 will be updated to 23. Conversely, if you manually change that cell to, say, 34, then execute x[1,2] you will see that it is now assigned 34. Same with the other cells. You can also add code to the embedded component that is executed whenever you manually change a cell in the data table.

@Joe Riel That's exactly that kind of

9colai — Thu, 28 Feb 2013 23:41:22 Z

@Joe Riel That's exactly that kind of table I was looking for, thanks! I would have given you a "like" if i could :-)

@Joe Riel One more DataTable question!

9colai — Fri, 01 Mar 2013 00:12:49 Z

@Joe Riel One more DataTable question! How do i round to lets say 3 digits instead of 10? It comes with numbers like 1,4354154543.

I use the "interface(displayprecision=3)" in the start of the worksheet, but it looks like I don't have any effect in the DataTable