Proper if/else statement in appdesigner

2022 10 14
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In app designer I would like to setup an if/else function that will control the lamp color. I want a value to be within 5% of control value to activate a lamp. I’m trying the below statement but it doesn’t seem to work even when values are exactly the same.
if app.rr_camber_ref.Value >= app.rr_camber.Value*0.95 && app.rr_camber_ref.Value <=app.rr_camber.Value*1.05
app.Lamp_rr_camber.Color='g';
else...
Can someone suggest what would be proper condition statement in this case?
Thank you,
Ted

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Walter Roberson
Walter Roberson 2022-10-14
For debugging purposes, stop at that line and then test
class(app.rr_camber_ref.Value)
class(app.rr_camber.Value)
size(app.rr_camber_ref.Value)
size(app.rr_camber.Value)
disp(app.rr_camber_ref.Value)
disp(app.rr_camber_ref.Value)
Cris LaPierre
Cris LaPierre 2022-10-14
What components are you using for app.rr_camber_ref and app.rr_camber? What are typical values for each?
Tudor Miron
Tudor Miron 2022-10-14
编辑：Tudor Miron 2022-10-14
I'm in a process of creating a simple app to aid in static setup of race vehicle (multibody model). Setup parameters of interest are dispayed in gui and I created additional displays for this setup parameters where I can save current values as reference of baseline setup. If I change some setting (front camber for example) I wanted to see which of the rest of setup parameters changed simultaneously (and lots of them do) and require resetting to baseline values so that I test that camber change only rather than multitude of other unintended setup changes. Green lamp will indicate if value of setup parameter is within prescribed tolerance of baseline setup parameter.
5% was just an arbitrary number that I used for my question.
Jan’s suggestion to assign values to variables and use those variables in IF/ELSE statement worked perfectly.

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Jan
Jan 2022-10-14

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Ref = app.rr_camber_ref.Value;
Value = app.rr_camber.Value;
if abs(Value - Ref) / abs(Ref) < 0.05
app.Lamp_rr_camber.Color='g';

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Tudor Miron
Tudor Miron 2022-10-14
移动：Voss 2022-10-14
Thanks Jan,
Assigning relevant values to a variable and than using this variables in IF/ELSE statement worked just fine.
Thank you!
Ted
Walter Roberson
Walter Roberson 2022-10-14
移动：Voss 2022-10-14
I suspect it was more the difference in how the test was calculated, not so much the fact that variables were assigned to.

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