You can use a code window (Edit>Code) to write a Maple-language procedure that contains a loop. You can then call that procedure in the canvas.

But you don't need a loop for your specific example - try filling the Matrix entirely within the constructor like so

a:=Matrix(n,n,(i,j)->2^(i+j)) 

For Flow 2021, you need activate both Maple and Flow

• Open Maple, go to Help > About, click on Reactivate License, and reactivate with the Purchase Code
• Then open Maple Flow, go to Help > About, click on Reactivate License, and reactivate with the Purchase Code

Flow 2022 (ready very soon!)  will be a single installer, so you don't need a prior installation of Maple.

You can't convert Maple Flow sheets to Maple sheets

ThermophysicalData:-Property(P, water, T = (273.15 + 24)*Unit(K), Q = 0)

Check archive.org: https://web.archive.org/web/20090715095509/http://chilli.open.ac.uk/dr9/solutions/sol-index.html

It's available here: http://www.trustiot.ecnu.edu.cn/show.aspx?info_lb=629&flag=101&info_id=1673

There's a zip file which contains an mla. I haven't installed or used it, so I don't know if it works

You say you want to plot the frequency-time characteristics of the signal. Assuming that's actually what you want, then use SignalProcessing:-Spectrogram with your time-domain data.

Look at this application: C Code to calculation flame temperature of octane

Maple 2018 lets you use units in fsolve.

For that worksheet, the result of fsolve becomes this:

See the attached worksheet for the complete application with units

Flow_through_an_Expansion_Valve.mw

The maps (and rotatable globe) in this application were developed with Maple 2017's world map tools (the application contains the plots, but not the code used to create the plots - I can give this to you in a separate worksheet)

Map_Projections.zip

If you have Maple 2017, go to the ?ApplicationGallery and look at the Structural Engineering section (specifically the "Steel Beam under Torsion" example).

Go to View > Show / Hide Contents..., deselect Execution Group Boundaries, and click OK

The unit of N wasn't correctly associated with the definition of F (they were actually two separate math regions). I've corrected this in the attached worksheet (and have also added with(Units[Simple]) to the top.

Berechnungen-1_shk.mwBerechnungen-1_shk.mw

While Maple 2017 doesn't have a direct link to weather data, you can connect Maple to web services that offer such data.

For example, https://openweathermap.org offer free and paid weather data that you can download straight into Maple via their API (we have no connection to openweathermap.org)

Here's an example call  that gives you the current weather conditions in Waterloo, Ontario (I've blanked out my API key):