How do I save using the App Designer

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Robert Jack
Robert Jack 2020-6-1
评论： Debt 2021-7-24
Hi, i've been struggling trying to get app designer to load in and then save a .mat file.
Loading in is fine.
function LoadButtonPushed(app, event)
app.File = load("data.mat");
app.UITable.Data = app.File.data;
end
data.mat is 50x9 table which itself holds additional tables within one column. I can show this data in a table easily enough as I have above.
I shall edit this data at a later point..
My question/problem is that:
All I want to do at the moment is to take this and save it as a seperate .mat file when I press a save button on my App in App Designer. However nothing I seem to do works.
function SaveButtonPushed(app, event)
app.File.Newdata = app.File.data; % Sticks the data into Newdata
%save('NewData.mat','-struct','app.File.NewData')
%save('NewData.mat') % Doesn't work
%save('NewData.mat','app.File.NewData')
%Below I tried to save the structure to a variable and then save it that way
NewData = app.File;
save(NewDataFile,'-struct','NewData');
end
Please if anyone has a solution I would be appreciative as I cannot seem to get it to work.
All I want is another file to be made with the data in.
  7 个评论
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Robert Jack
Robert Jack 2020-6-1
There seems to be a problem with the App designer that doesn't let you save certain things.
>> clear all
>> app.OldFile = load('batches.mat');
>> app.NewFile = app.OldFile;
>> app.NewFile.batches{:,1} = 1;
>> NewBatches = app.NewFile.batches;
>> save(NewBatches)
This above works perfectly(pretty much) when typed into the command Window.
I get the old 50x9 in OldFile, I make all of column 1 '1', and then I save the new 50x9 table in a NewBatches.mat file.
However I get the error
Warning: Unable to save App Designer app object. Save not supported for matlab.apps.AppBase objects.
when I use it in the App Designer
Debt
Debt 2021-7-24
I have a similar a problem,can you upload your files and data.mat ?I want to learn from them,thank you very much

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采纳的回答

Robert Jack
Robert Jack 2020-6-1
Got it to work
properties (Access = private)
OldFile % Description
NewFile % Description
end
% Callbacks that handle component events
methods (Access = private)
% Button pushed function: LoadButton
function LoadButtonPushed(app, event)
app.OldFile = load('batches.mat');
app.UITable.Data = app.OldFile.batches;
end
% Button pushed function: EditButton
function EditButtonPushed(app, event)
app.NewFile = app.OldFile; % works
app.NewFile.batches{:,1} = 1; %works
app.NewFile.NewBatches = app.NewFile.batches;
app.UITable2.Data = app.NewFile.NewBatches;
end
% Button pushed function: SaveButton
function SaveButtonPushed(app, event)
%NewBatches = app.NewFile.batches;
%NewBatches = saveobj('NewBatches');
%save('NewBatches')
NewBatches = app.NewFile.NewBatches;
save('NewBatches.mat',"NewBatches")
So I now have two seperate .mat files, one which is the old data and one which is my new edited data.
I am able to add functionality to the number of things I will want to edit within the function EditButtonPushed so i am happy.
Hopefully this helps anyone else who has struggled with the way App Designer saves things.
  1 个评论
Jeet Shetty
Jeet Shetty 2021-7-23
hello , i have a similar a problem where i want to save data for vales added to a UItable , i have also added a separate button and added a property but im not sure on how to save it and plot the new table using scatter plot
properties (Access = private)
sensor_table = gobjects(1,1); %initialize as graphics object
sensor_values
end
% Callbacks that handle component events
methods (Access = private)
% Button pushed function: RunButton
function RunButtonPushed(app, event)
platewidth=app.WidthEditField.Value;
plateheight=app.HeightEditField.Value;
GridWidth = app.GridWidthEditField.Value;
GridHeight = app.GridHeightEditField.Value;
Xcoordinate = app.XcoordinateEditField.Value;
Ycoordinate = app.YcoordinateEditField.Value;
Lengthofcell = app.LengthofcellEditField.Value;
Gridx = Xcoordinate : Lengthofcell : GridWidth+Xcoordinate;
Gridy = Ycoordinate : Lengthofcell : GridHeight+Ycoordinate;
if Gridx(end) >= platewidth
error('Grid x (%d) + grid width (%d) >= plate width (%d)', Xcoordinate, GridWidth, platewidth);
end
if Gridy(end) >= plateheight
error('Grid y (%d) + grid height (%d) >= plate height (%d)', Ycoordinate, GridHeight, plateheight);
end
Mx = length(Gridx);
My = length(Gridy);
[x, y] = meshgrid(Gridx, Gridy);
%create the list of text
labels = string(1:Mx*My).';
%insert the labels
hold(app.UIAxes, 'on')
scatter(app.UIAxes, x, y, "O", "MarkerFaceColor", 'r')
text(app.UIAxes, x(:), y(:), labels, 'HorizontalAlignment', 'left', 'verticalalignment', 'bottom')
%calculte the grid lines
grid1x = [Gridx;Gridx];
grid1y = [Gridy(1); Gridy(end)];
grid2x = [Gridx(1); Gridx(end)];
grid2y = [Gridy; Gridy].';
plot(app.UIAxes, grid1x, grid1y, "Color", 'b');
plot(app.UIAxes, grid2x, grid2y, "Color", 'b');
rectangle(app.UIAxes, 'Position', [0 0 platewidth plateheight],'LineWidth', 5);
box(app.UIAxes, 'on')
grid(app.UIAxes, 'on')
xlim(app.UIAxes,[0 platewidth])
ylim(app.UIAxes,[0 plateheight])
xticks(0:Xcoordinate:platewidth)
yticks(0:Ycoordinate:plateheight)
hold(app.UIAxes, 'off')
N = app.NoofSensorsEditField.Value;
sensor_number = (1:N).';
X_coordinate = zeros(N,1);
Y_coordinate = zeros(N,1);
T = table(sensor_number, X_coordinate, Y_coordinate);
app.sensor_table = uitable(app.UIFigure, 'Data', T);
app.sensor_table.ColumnEditable = true;
end
% Button pushed function: AddButton
function AddButtonPushed(app, event)
app.sensor_values=uitable(app.UIFigure, 'Data', T);

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