@_Maxim_ I'm using M18 and I get an error after img2 execution.

Error, (in SignalProcessing:-Engine:-FFT) data is not one-dimensional

@tomleslie actually I just copied the page from matlab.  I don't have the image.  But I found one similar on google images - here's the image but mapleprimes won't allow to insert it as a .jpg

**edit added** The file must be zipped to allow a download link to be added.

Interested as well. 

Firstly how do we get from the noisy clown to the spectrum image?

The single quotes are delayed evaluation.  That would be where the confusion is coming from.

a := int(1/((1-(1/4)*t^2)*sqrt(-t^2+1)*sqrt(-4*t^2+1)), t);

                                          /     1      \
                    a := EllipticPi |  t,   - ,  2  | 
                                          \     4      /
evalf(subs(t = 3/2, a));

                  0.1560547979 - 1.261993176 I

For comparison M12 shows the plots as ...

Well that's interesting!  The plots in Maple 12 are shown as black.  However in mapleprimes they're shown in color and in Maple 2017 the last three plots are shown blank. 

For explicit purposes the commands should show

Download shading-none.mw

@Carl Love actually the arrows aren't white otherwise you would see the boxed axes dissappearing as a white arrow passed in front. 

In fact arrows=THICK is the only option that makes shading=none work.  SLIM, LINE, and THIN don't produce any visible change from the empty plot.

Oh, ok.  But with no shading they should be black arrows.  I don't know why it changed to white, there should have been no reason for the programming change.

with(plots):
fieldplot3d([2*x, 2*y, 1], x = -1 .. 1, y = -1 .. 1, z = -1 .. 1, grid = [5, 5, 5], shading = none)

It works in Maple 12 and I think Maple 13 but at least from maple 18 on, shading=none does not work. 

@mapleatha with Maple 13 the standard GUI comes with classic.  This will load the standard GUI, (I'm guessing you're using windows)

You've probably been using a shortcut which loads classic, which is the same as doing this

So I believe what you mean is ..

.. you want to send a file to an ftp address using the URL package command POST

@hpc insequence=true merely means to execute the sequence of plots consecutively.

@tomleslie thanks.  I appreciate your work on the subject.  Another tough word is "doable". 

Your example of dealmaker and deactivate are examples of two different types of words, one is a combination of two words "deal-maker" while the other is a word with a prefix "de-activate".

I think if we create enough rules we can crack the syllable code, but perhaps there are too many one off rules that make the code impossible to complete?