DSkoog

Daniel Skoog

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6 years, 83 days
Maplesoft
Maple Product Manager

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Daniel Skoog is a Product Manager for Maplesoft. He holds a B.Sc. in Mathematics from Queen’s University, Canada and a M.Sc. in Financial Mathematics from Uppsala University, Sweden. Daniel joined Maplesoft in 2011 and has used his applied technical expertise of mathematics, statistics, data analysis and software design to deliver several exciting new releases. Daniel has also contributed several commands to the Maple library, having authored new routines in Statistics, Finance and data analysis.

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These are answers submitted by DSkoog

The only way to display annotations on plots (as of Maple 2016) is by using the point probe: http://www.maplesoft.com/support/help/Maple/view.aspx?path=worksheet/plotinterface/pointprobe

Since you mentioned "information", I'm guessing that you are looking for more than just cursor position or nearest point coordinates though, which is something that is not currently possible, but would make a nice addition in a future release.

Numeric Formatting is only a display layer, so you don't need to worry about any loss of precision in your computations.

To turn it off (or on), put your cursor somewhere in the document block containing your computations and go to the Format menu and choose Numeric Formatting. Set it to None and Apply it.

If it keeps reappearing, then you may have clicked Apply and Set as Default, which means to turn it off, you have to repeat these steps but choose None and Apply and Set as Default.

One more note about numeric formatting, as you can see in your picture, numeric formatting is applied to all lines in a document block. If you wanted to use numeric formatting on only one line, you would need to separate your code into separate document blocks (lines) and then apply the desired numeric formatting.

Hope that helps.

Maple 2017 is currently in beta, so you will hopefully see it in a few months time.

I think that the issue here is actually a collision between the MTM:-solve command and the top-level solve command. I was able to reproduce this issue by entering in:

with(MTM):
5*x - 3 = 19

Then right-clicking on the 5*x-3=19 expression and choosing Solve from the Solve menu. The problem here is that the context menu code calls:

MTM:-solve( {5*x-3=19} );

which errors out, whereas it should call:

:-solve( {5*x-19} );

which would return the intended solution.

One quick workaround for this is then to not load the MTM package before you use the context menu operation.

I'll file an internal report on this to see if we can improve this.

The writeto command writes output from any subsequent run commands, however the results of running showstat aren't strictly speaking output.

So instead, you can use the print command to print out your procedure. If you are interested in printing the body of any of Maple's library procedures, you will need to adjust the interface setting for verboseproc to 2:

interface( verboseproc = 2 ):

You can print out the results to your file as follows:

MyProc := ( ) -> "Hello World";
writeto( "MyFile.txt" );
print( MyProc );

Also remember if you want to stop writing to the file and write to Maple again, you can use:

writeto( terminal );

Hope that helps.

Here are some more details on connectivity for Maple and Excel: https://www.maplesoft.com/products/maple/features/ExcelConnectivity.aspx 

Maple uses the default worksheet styleset for documents unless you have specifed a custom style set in the style set dialog.

Now that said, the steps that you take to set your custom style set are correct as mentioned ( select a custom style set as your "User-defined Style Set" in the Style Sets dialogue ), however the other issue that you are seeing, namely that Maple always uses italic for math is in fact a bug. There is unfortunately no workaround for this (as you have already discovered by editing the xml). Hopefully we can get around to fixing it sometime soon.

To answer another question, the default style set that Maple uses for both its documents and help pages can be found in the %MAPLEINSTALLDIR/data/stylesets/ directory.

The try statement is used for exception handling, for example:

try
    error;
catch:
    print("Error occurred"):
end try:

If you have a network license, I believe that there are (for cost) tools available from Flexera (the maker of LMTools, Maple's license manager) for reporting on license usage. Otherwise, you can also have your system adminstrator manually go through your lmgrd logs.

If you are looking to retrieve the document meta-data, try the DocumentTools:-GetDocumentProperty command. 

If you want to get the document properties for the document you are currently in, use:

DocumentTools:-GetDocumentProperty(all)

Just in case anyone else is interested, you can set document properties in a couple of ways:

If you have a document open, you can go to File - Document Properties.

If you want to set properties programmatically, you can use the DocumentTools:-SetDocumentProperty command.

Have you tried using the Worksheet:-DisplayFile command? This open an existing Maple worksheet in a new window.

If this question pertains to clearing input and output in a command-line session of Maple without performing a restart, you could use:

In Unix:

system( clear );

In Windows:

system( cls );

If you are talking about clearing the input and output without a restart in a Maple worksheet, the only thing I believe that you can do is to select all the text in your session and then delete it.

You're just missing a colon in the P3 line. As it is, you are entering an expression 'P3 = 3/7*1000 W'. When you attempt to apply units formatting to this, it tries to format the entire expression, resulting in an error.

 

If you instead use: P3 := 3/7*1000 W, Units formatting will only attempt to format the right hand side, '3/7*1000 W'.

After testing your code and data, I can see Maple hitting a couple of snags with import and joining of TimeSeries data. For reasons that I'm not yet clear on, the import of your data from the Excel xlsx comes in as an integer value that Maple doesn't play well with. To get around this, I split your data into two separate csv files and read those in.

After doing so using ImportMatrix, I didn't have any immediate success merging the TimeSeries data, so I instead tried using a DataFrame, which is slightly more agnostic to incoming data. I usually use DataFrames whenever I have row or column labels, which in this case are the dates and column headers respectively. Storing the data in a DataFrame also makes it much easier to apply any relevant Statistics commands to the data. You might still be able to import your data using ExcelTools:-Import and other techniques, but this seemed like the quickest approach to me.

By default, the Import command uses a DataFrame for storage:

PMEAS_ROUGH := Import( "this:///PM.csv" );
QGAS_ROUGH  := Import( "this:///QG.csv" );

The Append command merges the two DataFrames, however the row labels are not sorted.

DF := Append( PMEAS_ROUGH, QGAS_ROUGH );

Reorder the DataFrame, sorting on the row labels:

DF := DF[ sort(RowLabels(DF)), ..];

Optional: Convert the resulting DataFrame to a TimeSeries:

TS := TimeSeriesAnalysis:-TimeSeries( Matrix( < < RowLabels( DF ) > | convert( DF, Matrix )> ), headers = 1 , dates = 1);

 

I've added an example worksheet (in a zipped Workbook with attached data csv files) - DataFrame_Example.zip

Hope this helps.

Hi Erik,

I've played around with this a bit and do think that you're correct in that there's a slight gap in the GUI interaction model: if someone is using the GUI interface (i.e. menus) there is no interactive way to "Import" data that is stored in a Workbook. While @tomleslie's programmatic suggestion is probably the only way to accomplish this at the moment, I agree that we could add a step to the "Data Import Assistant" that allows a user to "import" from their own Workbook or the file system (leaving aside the issue of if should still be called import if it's already stored inside of the containing document).

 

A decent parallel here is how the Workbook treats inserting images. If there is an image present in the Workbook explorer tree, then going to Insert -> Image -> From Attachment brings up a dialog that allows a user to select attachments from the Workbook tree. I'd imagine this is more in line with your expectations for the file selection dialogue box for the Data Import Assistant as well. I'll add a task for us to see about adding this for data files (and any other attachments that we can think of).

Thanks.
Daniel

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