Is there any equivalent to Excel function arctan2?

This function takes x and y values, and returns values from -Pi to +Pi. In that way one can easily get the x and y values of an angle with correct signs.

Are there any examples showing how to plot multiple items in one plot?

• What I have started with is to put a Plot component in my sheet, so that I can use that by its name.
• Next thing on the list was to generate different plot objects, by assigning each of them to a variable.
• To plot the whole bunch, I collected all the items I want to plot in a list
• And plotted them by SetProperty("MyPlotcomponent", value, display(plotlist))

I wonder if this is the best way to do it. Especially when adding more stuff afterwards, would it be possible to just add something to the plot component?

Do I need plot components at all?

What's the correct way of copying the current contents of a mutable object to a variable.

Apparently eval doesn't do the job.

Download Mutable.mw

When converting a list which includes lists to a set, duplicate entries are dropped.

However converting a list with vectors to a set, no duplicate entries are dropped.

Any explanation to that behaviour?

Download DuplicateEntries.mw

I'm getting a strange error today when trying to save a file on the network. Rebootet machine, no change.

Any hints?