I've reduced some of my code to the code here
Manipulate[
(*output here here*)
{j, 1, 40, 1},
{k, 1, Dynamic[j], 1},
]
The problem I'd like to fix is that if I set j to 40, then k to 35, and then set j down to 20, a bunch of errors get thrown. Is there a way to add something to the code here that when j gets updated k gets reset to 1?
I assume by error, you mean you get this red marking.
This just says upper limit of slider is reached. You can throttle this like this
Manipulate[
If[k > j, k = j];
Row[{"j=", j, ", k=", k}],
{{j, 1, "j"}, 1, 40, 1, Appearance -> "Labeled"},
{{k, 1, "k"}, 1, Dynamic[j], 1, Appearance -> "Labeled"},
TrackedSymbols :> {j, k}
]
And now if upper limit for k is more than j, it will go to match j.
You should also always add TrackedSymbols
Using an explicit Dynamic is not necessary.
$Version
(* "14.0.0 for Mac OS X ARM (64-bit) (December 13, 2023)" *)
Clear["Global`*"]
Manipulate[
k = Min[k, j];
StringForm["j = ``; k = ``", j, k],
{{j, 20}, 1, 40, 1, Appearance -> "Labeled"},
{{k, 10}, 1, j, 1, Appearance -> "Labeled"},
SynchronousUpdating -> False,
TrackedSymbols :> {j, k}]
{j, 1, 40, 1}with{j, 1, 40, 1, TrackingFunction -> (j = #; k = 1; &)}? $\endgroup${j, 1, 40, 1, TrackingFunction -> (j = #; k = Min[#, k]; &)}to resetktojwhenjmoves below current value ofk(as in Nasser's answer). $\endgroup$