displayFormula in LiveScript giving me a red triangle with a question mark - and NO explanation!

Can someone tell me why this code:

syms y t;
y=(-t-2);
eq="(S+1)*int(y,t,t+3,3)";
eqstr=["'Region 2'"; eq ; "'for t+3>=-2 and t+(7-D)<=2'"];
displayFormula(eqstr)

gives me the following output:

Specifically, why the heck am I getting that red triangle with NO explanation in the Live Editor, and also "Region 2" has the 2 as a subscript?

When I run the code in the interpreter, things work fine and I get the following:

...but no error telling me something was awry that would justify the red question mark in the Live Editor.

Does anyone have any idea?

Answer 1

[Cris LaPierre]

I can't say why it is doing what it is doing. However, some playing around determined the following.

• It appears when a string ends with a number, it is automatcally getting subscripted in a live script. Place a space after the number to avoid the subscripting.
• Removing the "<" fixes the red diamond with a question mark. I realize you need it. I just haven't figured out how to do that.

syms y t
y=(-t-2);
eq="(2+1)*int(y,t,t+3,3)";
eqstr=["'Region 2 '"; eq ; "'for t+3>=-2 and t+(7-D) =2 '"];
displayFormula(eqstr)

Region 2 

for t+3>=-2 and t+(7-D) =2 

Both of these look like issues that should be reported to MathWorks support. You can do that here.

[Dimitri]

Thank you so much for spening the time to analyze it. Much appreciated!

[Cris LaPierre]

Here's a workaround for the '<'. This uses &ge; for '>=' and &le; for '<='.

syms y t;
y=(-t-2);
eq="(S+1)*int(y,t,t+3,3)";
eqstr=["'Region 2 '"; eq ; "'for t+3 ≥ -2 and t+(7-D) ≤ 2 '"];
displayFormula(eqstr)

Region 2 

for t+3 ≥ -2 and t+(7-D) ≤ 2 

[Dimitri]

That is great. Thank you so very much!