Re: [expr ] help needed

could it be some confusion between x, y from [value x]. [value y] and 
the x and y used for input/last output (e.g. in fexpr~)?

does it work if you rename x, y to a, b?


On 14/12/2025 14:59, Antoine Rousseau wrote:
> it works here, double check your order of operations:
>
> #N canvas 131 195 450 300 12;
> #X msg 119 70 1 0 1.5708;
> #X floatatom 119 140 15 0 0 0 - - - 0;
> #X floatatom 361 137 5 0 0 0 - - - 0;
> #X obj 119 95 expr ($f1*cos($f3))-($f2*sin($f3)) \; 
> ($f1*sin($f3))+($f2*cos($f3));
> #X connect 0 0 3 0;
> #X connect 3 0 1 0;
> #X connect 3 1 2 0;
>
> Antoine
>
>
> Le dim. 14 déc. 2025 à 11:56, Hrvoje Radnic via Pd-list 
> <[email protected]> a écrit :
>
>     Thank you Miller for your suggestion. I don't think that's the
>     case, I checked the order of operations with [print] and
>     everything looks like it should. I even made the signal version of
>     the whole [expr] computation in order to bypass the possibility of
>     wrong order and the result is repeated there as well. So, it must
>     be math inside [expr], but I really struggle to find any clue.
>
>     Hrvoje Radnic
>
>     https://www.instagram.com/singlecycled/
>
>     https://pdvrecords.bandcamp.com/album/umovi-protiv-valova
>     https://soundcloud.com/sumovi-protiv-valova
>     00385(0)915225162
>
>
>     On Saturday, November 29, 2025 at 04:40:48 PM GMT+1, Miller
>     Puckette via Pd-list <[email protected]> wrote:
>
>
>     Are you by any chance updating x before running the y calculation? If
>     you do that, y will be
>     calculated using the updated x and not the correct (original) one.
>
>     cheers
>     Miller
>
>     On 11/29/25 6:49 AM, Hrvoje Radnic via Pd-list wrote:
>     > Dear group,
>     >
>     > I cannot figure out why the calculations inside
>     >  [expr (x*cos(theta))-(y*sin(theta));
>     > (x*sin(theta))+(y*cos(theta))] gives me wrong results.
>     >
>     > The above mentioned formula for rotation is correct. I
>     initialize the
>     > values through [value] object before preforming computation. The
>     > initial values are: x=1, y=0, theta=1/2pi. I expect  the new x
>     and new
>     > y to be (0,1) respectively after the rotation. But, for some
>     reason, I
>     > get (-1,1). I checked the help files for [value] and [expr] and it
>     > looks like I am doing everything right.
>     > Anyone have an idea where's the mistake?
>     > Thank you!
>     > Hrvoje Radnic
>     >
>     > https://www.instagram.com/singlecycled/
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