Proper if/else statement in appdesigner

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

[Walter Roberson]

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]

What components are you using for app.rr_camber_ref and app.rr_camber? What are typical values for each?

[Tudor Miron]

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.

Answer 1

[Jan]

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';

[Tudor Miron]

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]

I suspect it was more the difference in how the test was calculated, not so much the fact that variables were assigned to.