Dear all,
I need to create a boolean vector, such as [%t, %t, %t, %t] but with a
number of components given by a variable n. I couldn't find a function
similar to ones(1,n).
However I've found a workaround:
a = ones(1,n) & %t
It shouldn't work because ones(1,n) is not boolean, but it does.
Q
Hello,
> De : Federico Miyara
> Envoyé : mercredi 4 septembre 2019 09:11
>
> I need to create a boolean vector, such as [%t, %t, %t, %t] […] I
> couldn't find a function similar to ones(1,n).
>
> However I've found a workaround:
>
> a = ones(1,n) & %t
> […]
> 1) Why does it work?
Because "A numbe
Hello,
Le 04/09/2019 à 09:11, Federico Miyara a écrit :
Dear all,
I need to create a boolean vector, such as [%t, %t, %t, %t] but with a
number of components given by a variable n. I couldn't find a function
similar to ones(1,n).
However I've found a workaround:
a = ones(1,n) & %t
It sho
Le 04/09/2019 à 09:39, Stéphane Mottelet a écrit :
Hello,
Le 04/09/2019 à 09:11, Federico Miyara a écrit :
Dear all,
I need to create a boolean vector, such as [%t, %t, %t, %t] but with
a number of components given by a variable n. I couldn't find a
function similar to ones(1,n).
Howeve
Stéphane,
Questions:
1) Why does it work?
2) Is there some native function to create bolean matrices
3) If not, are there any plans to introduce functions such as
true(m,n) or false(m,n)?
Yes, there :
https://codereview.scilab.org/#/c/19964/
S.
with the following syntax:
ones(n,m,"boole
Le 04/09/2019 à 20:19, Federico Miyara a écrit :
Stéphane,
Questions:
1) Why does it work?
2) Is there some native function to create bolean matrices
3) If not, are there any plans to introduce functions such as
true(m,n) or false(m,n)?
Yes, there :
https://codereview.scilab.org/#/c/19964
Hi,
I’m not convinced the new syntax: ones(n, m, “boolean”) is a good idea or is
necessary because it makes “integer” (“constant”) and “boolean” 2 identical
types.
There is a simple way to do the same :
repmat(%t, n, m)
Alain
___
users mailing list
u
Le 05/09/2019 à 08:55, Lamy Alain a écrit :
Hi,
I’m not convinced the new syntax: ones(n, m, “boolean”) is a good idea
or is necessary because it makes “integer” (“constant”) and “boolean”
2 identical types.
Sorry Alain can you explain it further ?
There is a simple way to do the same :
Christophe,
Thanks!
Two more questions (for anybody reading and willing to reply):
1) Is there an exclusive or function? I couldn't find it, a search leads
to the XOR mode of combining graphic pixels. It would be most useful
since it is one of the operations in the Galois field GF(2). Curren
On 05/09/2019 04:13, Stéphane Mottelet wrote:
Le 05/09/2019 à 08:55, Lamy Alain a écrit :
Hi,
I’m not convinced the new syntax: ones(n, m, “boolean”) is a good
idea or is necessary because it makes “integer” (“constant”) and
“boolean” 2 identical types.
Sorry Alain can you explain it f
When I say ineficient, I mean that kind of behavior:
--> tic;repmat(uint8(0),1,1);toc
ans =
1.622535
compared to proposed implementation:
--> tic;a=zeros(1,1,"uint8");toc
ans =
0.063472
S.
Quoting Stéphane Mottelet :
Le 05/09/2019 à 08:55, Lamy Alain a écrit :
+1 interested in this patch
De : users De la part de Stéphane Mottelet
Envoyé : jeudi 5 septembre 2019 08:46
À : users@lists.scilab.org
Objet : Re: [Scilab-users] Generating a boolean vector or matrix
Le 04/09/2019 à 20:19, Federico Miyara a écrit :
Stéphane,
Questions:
1) Why does it work
What I didn’t like at first is to use “ones” for a boolean type.
(although I know the 2 types are almost interchangeable in Scilab).
The existing function bool2s changes %t into 1.
So thinking about it a little more, OK for the proposed extensions of “ones”
and “zeros”.
Alain
___
Le 05/09/2019 à 11:28, Lamy Alain a écrit :
What I didn’t like at first is to use “ones” for a boolean type.
That was also my first reaction.
When comparing the learning curve and overall ease of use of scilab with
other options (matlab, julia, python), I always come to the conclusion
that
Le 05/09/2019 à 12:44, Antoine Monmayrant a écrit :
Le 05/09/2019 à 11:28, Lamy Alain a écrit :
What I didn’t like at first is to use “ones” for a boolean type.
That was also my first reaction.
When comparing the learning curve and overall ease of use of scilab
with other options (matlab,
Le 04/09/2019 à 09:11, Federico Miyara a écrit :
Dear all,
I need to create a boolean vector, such as [%t, %t, %t, %t] but with a
number of components given by a variable n. I couldn't find a function
similar to ones(1,n).
However I've found a workaround:
a = ones(1,n) & %t
It shouldn't w
Le 13/09/2019 à 15:04, Samuel Gougeon a écrit :
Le 04/09/2019 à 09:11, Federico Miyara a écrit :
Dear all,
I need to create a boolean vector, such as [%t, %t, %t, %t] but with
a number of components given by a variable n. I couldn't find a
function similar to ones(1,n).
However I've found
Le 13/09/2019 à 15:32, Stéphane Mottelet a écrit :
.../...
I am neither very convinced by the ones(m,n,.,"boolean") and
zeros(m,n,.. "boolean") proposal, for the same reason initially
exposed by Alain. But why not.
In the same commit, Stéphane proposes to allow using the *"logical"*
keyword
Le 13/09/2019 à 15:32, Stéphane Mottelet a écrit :
.../...
OK Samuel, I can forget this one. However, "double" should be kept as
an equivalent of "constant", even if not the name of a scilab type
returned by typeof(). We already have the macro "double()" (instead of
"constant()") and the keywo
Le 13/09/2019 à 16:17, Samuel Gougeon a écrit :
Le 13/09/2019 à 15:32, Stéphane Mottelet a écrit :
.../...
OK Samuel, I can forget this one. However, "double" should be kept as
an equivalent of "constant", even if not the name of a scilab type
returned by typeof(). We already have the macro "
Le 05/09/2019 à 12:44, Antoine Monmayrant a écrit :
Le 05/09/2019 à 11:28, Lamy Alain a écrit :
What I didn’t like at first is to use “ones” for a boolean type.
That was also my first reaction.
When comparing the learning curve and overall ease of use of scilab
with other options (matlab, ju
Stéphane,
I hope no. These are typical -- IMO fake -- functions that i would
not expect in Scilab (and in any other language). There are many
trivial and fast ways to create a boolean array of given dimensions.
true(m,n) may be fake if, as in other message has been clarified,
boolean take
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