While loop does not repeat
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clc;close all;clear all;
[~,Spot]= xlsread('parkingspot.xlsx','A1:B4');
pick =choose();
spotcheck = strcmpi(Spot,'V');
spotcheck = 1;
while (spotcheck == 1)
spotcheck = {spotcheck};
pick =choose();
end
xlswrite('parkingspot.xlsx','V',1,pick);
The excel file that i load in:
Spot =
2×2 cell array
{'V'} {'V' }
{'V'} {0×0 char}
The pick =choose() function:
list = {'A1','A2','A3','A4','B1','B2','B3','B4'};
[pick,tf] = listdlg('PromptString',{'Select a Parking Spot.',...
'Checking if slot still available.',''},...
'SelectionMode','single','ListString',list);
switch pick
case 1
pick = 'A1';
case 2
pick = 'A2';
case 3
pick = 'A3';
case 4
pick = 'A4';
case 5
pick = 'B1';
case 6
pick = 'B2';
case 7
pick = 'B3';
case 8
pick = 'B4';
So the idea is if i pick "B4" it will check if B4 has a 'V' value in the cell, and if not it will repeat the choosing step, but the while() loop doesnt seem to work, please help
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Answers (1)
Cris LaPierre
on 16 May 2021
Edited: Cris LaPierre
on 16 May 2021
Be careful. You are heading down the path of creating an infinite loop.
Your loop is not running multiple times right now due to the syntax error you are getting (the red error message).
spotcheck = 1;
% This line represents how you set spotcheck in your while loop
spotcheck = {spotcheck}
% This line represents the comparison performed in your while loop conditional statement
spotcheck == 1
Perhaps you have removed some of your code in an attempt to simplify your example? The way to fix the error in what you have shared is to not use the curly braces when assigning a value to spotcheck.
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