does not plot the normal distribution. Writes Unrecognized function or variable 'O'. What is the reason?

classdef app3 < matlab.apps.AppBase

% Properties that correspond to app components

properties (Access = public)

UIFigure matlab.ui.Figure

Button_4 matlab.ui.control.Button

Button_3 matlab.ui.control.Button

Button_2 matlab.ui.control.StateButton

UITable matlab.ui.control.Table

Image matlab.ui.control.Image

Button matlab.ui.control.Button

UIAxes3 matlab.ui.control.UIAxes

UIAxes2 matlab.ui.control.UIAxes

UIAxes matlab.ui.control.UIAxes

end

% Callbacks that handle component events

methods (Access = private)

% Image clicked function: Image

function ImageClicked(app, event)

[filename,pathname]=uigetfile ({'*.txt'}, 'File Selector');

fullpath=strcat(pathname,filename);

x=readtable(fullpath);

app.UITable.Data=x;

app.UITable.ColumnName=x.Properties.VariableNames;

year=x(:,1);

lat=x(:,2);

lon=x(:,3);

app.O=x(:,4);

end

% Cell edit callback: UITable

function UITableCellEdit(app, event)

end

% Value changed function: Button_2

function Button_2ValueChanged(app, event)

histfit(app.UIAxes, table2array (app.O))

Answer 1

[Chris]

app.O is a property that needs to be declared in a properties block before it can be used.

Since it's not declared, an error is thrown when you try to assign or retrieve it.