add cart2pol function and friends

[cbm755]

Presumably this just calls atan2 and hypot...

Could also investigate whether upstream Octave can be improved to make these "just work" on any class that has atan2 and hypot.

[alexvong243f]

I think this is already in octave. Does SMT have a symbolic version of it? I can't find any SMT documentation mentioning cart2pol.

[alexvong243f]

No problem, we can just add it anyway for convenience

[cbm755]

Does the built-in one work with symbolic input?

I don't think the built-in one works with symbolic input:

>> cart2pol(sym(4),sym(5))
error: cart2pol: X, Y must be numeric arrays of the same size, or scalar
error: called from
    cart2pol at line 67 column 7

[OmkarTipugade]

I want to work on this issue Please guide me in solving this issue Sir, I am new to Open Source Please tell me what thing I have to do first

[cbm755]

@OmkarTipugade, sounds great. @alexvong243f added cart2pol.

There are still three functions on this list:

• pol2cart
• cart2sph
• sph2cart

I suggest you start with pol2cart. Go look at inst/@sym/cart2pol.m, copy it and modify it. You should read help pol2cart (to understand what the double precision function does).

---

Note these functions have a HUGE amount of "boilerplate" code but for example the basic operation in cart2pol is just these two lines:

  r = hypot (sym (x), sym (y));
  theta = atan2 (sym (y), sym (x));

[OmkarTipugade]

Thank you so much for replaying me.

Sir, please send a link - help pol2cart

On Thu, Sep 14, 2023 at 12:09 PM Colin B. Macdonald < @.***> wrote:

@OmkarTipugade https://github.com/OmkarTipugade, sounds great. @alexvong243f https://github.com/alexvong243f added cart2pol.

There are still three functions on this list:

• pol2cart
• cart2sph
• sph2cart

I suggest you start with pol2cart. Go look at @.***/cart2pol.m, copy it and modify it. You should read help pol2cart (to understand what the double precision function does).

Note these functions have a HUGE amount of "boilerplate" code but for example the basic operation in cart2pol is just these two lines:

r = hypot (sym (x), sym (y)); theta = atan2 (sym (y), sym (x));

— Reply to this email directly, view it on GitHub https://github.com/gnu-octave/symbolic/issues/865#issuecomment-1718849236, or unsubscribe https://github.com/notifications/unsubscribe-auth/A3BAYSKQYRPQKGQ6DW7LWZTX2KRDRANCNFSM4EQ5GCBQ . You are receiving this because you were mentioned.Message ID: @.***>

[cbm755]

please send a link - help pol2cart

help pol2cart is a command to type into GNU Octave. You will definitely need to be familiar with Octave to make progress within this project.

Some other resources include our wiki https://github.com/gnu-octave/symbolic/wiki and perhaps internet searches such "how to contribute to free and open source software".

[OmkarTipugade]

Sir, my task is to add the pol2cart function, which transforms polar coordinates into cartesian coordinates Sir, am I right?

On Thu, Sep 14, 2023 at 9:59 PM Colin B. Macdonald @.***> wrote:

please send a link - help pol2cart

help pol2cart is a command to type into GNU Octave. You will definitely need to be familiar with Octave to make progress within this project.

Some other resources include our wiki https://github.com/gnu-octave/symbolic/wiki and perhaps internet searches such "how to contribute to free and open source software".

— Reply to this email directly, view it on GitHub https://github.com/gnu-octave/symbolic/issues/865#issuecomment-1719774734, or unsubscribe https://github.com/notifications/unsubscribe-auth/A3BAYSITSA5IU6ICV56UXJTX2MWFHANCNFSM4EQ5GCBQ . You are receiving this because you were mentioned.Message ID: @.***>