Hi,
I wonder whether I have now strange things with a Snap!_v6 project using the APL library.
-
with the transpose function
-
those two catenate functions give the same result :
Did I misunderstood something ? Thank you.
Hi,
I wonder whether I have now strange things with a Snap!_v6 project using the APL library.
with the transpose function
those two catenate functions give the same result :
Did I misunderstood something ? Thank you.
I have another problem with signum :
I throw 3 cubic dices 4 times :
Then I count the 6 :
I expected 1 when True and 0 when False...
It worked before :
Ah, thanks for reporting these things! I'll look into them right away.
Okay, three different results.
Transpose: I am unable to reproduce this problem:
Catenate: This is the expected behavior. For vectors, there is no "vertical" or "horizontal." You can see the difference in behavior for matrices or higher dimensions:
Signum: This one is indeed a new bug in 6.6, the result of my attempt to speed up the computation. Turns out you can't put a recursive call inside a compiled MAP. :~( This will be fixed next maintenance release, but meanwhile, edit SIGNUM (and also FACTORIAL and other such monadic hyperblocks) and chose uncompile in the compiled MAP block's right-click menu.
Not at all.
I first charged the APL primitives on a Snap6.6 editor.
Then I opened my project (created with the Snap!_v6 APL primitive).
And I noticed that the transpose bloc of my project substitute the one of the new APL primitives.
This is the transpose bloc that I have :
If I reload a second time the APL library, I have the right transpose bloc.
Thank you.
It works.
I have another big problem.
The map block doesn't work anymore.
Because I absolutly need the map function to prepare an APL lìbrary keynote for a university workshop of linear algebra.
In the previous example, I wanted to generate a random matrix filled with numbers choosed randomly in {0,1} .
Why am I obliged to create first my random numbers list to reshape it like this ?
You used a shallow map.
Hi Nathalie,
if you use MAP before RESHAPE this should work:
alternatively you could implement deep map as @18001767679 suggests.
I just figured it out.
Thank you Jens !
So I created this function to generate a random matrix :
It works perfectly. I love Snap!. You can really do whatever you want with it !
yep, that's exactly what I was suggesting, great!
And thanks for the deep map function !
I don't think so.
hmm... how strange. Here's my project:
let's see how it might be different.... Can you share yours?
I see, did you make sure the first input (named "fun") is a ring and not an "any, unevaluated" input?
This was exactly the problem (I can see the logic now...).
It works now, have a look :
And now, I have to understand how this function deep map
works...
Hi,
I try to map
a function which takes a list of lists as entry (a matrix).
Here is a function that creates a special matrix :
Then I map this function to list([1,n]) (n is an integer, here equals to 4) :
Then I would like to map my function trace
which calculates the trace of each matrix contained in the whole result matrix that I called M :
So, I tried to do this :
It works :
How can I do that with a map
bloc?
Thank you.