Your variable name RxText3
suggests that RxText3
contains a char array. To verify this set a breakpoint and check class(RxText3)
. If so, you have to convert the output to a double value, use str2double
Incorrect subtraction value in Matlab GUI
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22-09-2022 - |
문제
I am working with COM port and I am getting a value (e.g. temperature value) from COM. Now when I am trying to subtract a specific value (e.g. 8) from this value it is not showing desired value. Here is the code:
function pushbutton1_Callback(hObject, eventdata, handles)
instrreset; %resets the serial devices
clc;
s = serial ('COM6');
RxText3 = fscanf(handles.serConn);
key = 8;
P = minus(RxText3,key);
set(handles.tempserial,'string',P);
fclose(s);
What I am expecting: Suppose I am getting a value as 32 and my key value is 8. Then I am expecting to get 24.
What I am getting: I am getting two values as 42 and 45.
Additional problem:
How can I set the value so that it would show 24 Celcius? I tried this : set(handles.tempserial,'string',P, 'Celcius') in which case nothing is shown.
해결책
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