I keep getting a “cannot convert double value “…” to a handle. Does anybody know how I can fix my code in order for this to go away

DOES ANYBODY KNOW HOW TO FIX THIS? I keep getting a “cannot convert double value “…” to a handle. Does anybody know how I can fix my code in order for this to go away?

[Dyuman Joshi]

Please share your code and specify what you are trying to do.

[Steven Lord]

In addition to showing your code, please show us the full and exact text of the error message. Don't paraphrase or summarize it, copy and paste it exactly as it's displayed in the Command Window.

[Zalif]

To specify. I’m making a calculator for a class project and basically i’m trying to get that when you enter a number in text 1 box and a 2nd number in text 2 box , that you when you select multiply add subtract or divide that the answer appears in the 3rd text box. I’ll share my code later on but i hope this clears that up a little.

[Zalif]

this the interface

[Zalif]

[Zalif]

this is the error code i keep getting for any math i try to do

[Zalif]

[Zalif]

and this is the code for the app where the summarized error pops up

Answer 1

[Walter Roberson]

Historically, up to R2014a, it was the case that graphics handles were returned as double precision numbers. This allowed constructions such as

h(1) = plot(x, y);
h(2) = x(1);
h(3) = x(end);

However, as of R2014b, graphics routines return handles to graphics.

In the above example, the first statement would initialize h as being an array of graphics handles, containing the handle to a chart line object. The second statement would then try to convert the value in x(1) into a graphics handle. If x(1) just happened to be 1 then the conversion would probably succeed, becoming a handle to figure 1. Then the third statement would try to convert x(end) to a handle, which would probably fail because no figure numbered the same as x(end) probably exists.

If you have code that mixes graphics handles and numeric objects, then you need to separate them.

Answer 2

[Steven Lord]

Seeing the screenshot of the code helped me understand the problem.

Note in your multipulcationButtonPushed method (you misspelled multiplication BTW) you retrieve the values from the edit field by accessing their Value properties to create the variables a and b. But when you attempt to populate the answer field on the last line of that method, you try to assign the variable k into the AnswerEditField property of the app rather than the Value property of the AnswerEditField property of the app. Try:

function multipulcationButtonPushed(app, event)
a = app.FirstNumberEditField.Value;
b = app.SecondNumberEditField.Value;
k = a*b;
app.AnswerEditField.Value = k;
end

You have the same problem in your other arithmetic methods.