How to save data in guide

Hello All,

would you be so kind, can you help me resolve my problem? I dont know how to save data, which I have loaded into uitable in guide. I need analyze these data...I need access to data after closing figure...:( My uitable contains about 80 000 rows.

[Geoff Hayes]

Radoslav - how did the data get loaded into the uitable in the first place? From a file that the user selected or was it generated by the business logic of the GUI?

[Radoslav Vandzura]

from a file....I push pushbutton load data....

[Geoff Hayes]

Since the data is from a file, then you already have access to it even after the GUI has closed. I don't understand why you feel that you somehow need to save it the workspace or perhaps a mat file if you already have the data.

[Radoslav Vandzura]

But I dont want to save it on my desktop (or directory), I want to save it in Matlab memory because I want to close actual figure and I want to open new figure where I will analyze data (call the variables, data).

I create aplication in guide which is designed for data mining (data analysis) and it consists from many figures. Every figure is for different part of analysis, first figure is for data loading and saving. Next figure is for cleaning the data, next is for visualization and so on. So I need to access to data all the time. Do you understand? :)

Answer 1

[Image Analyst]

If you've closed the figure, any data stored in the figure is lost. The only way to get it again is to write it to a file. You can use xlswrite, dlmwrite(), fprintf(), save(), or a bunch of other ways.

[Radoslav Vandzura]

And when i want to create save button what i shoult write inside the function?

[Image Analyst]

It doesn't need to be a special button just for calling save() - you can put the call in to save anywhere in your code that you want to save the variable to a .mat file. Let's say you want to save a variable called "data", you'd do

folder = 'c:/whatever';
baseFileName = 'SavedData.mat';
fullFileName = fullfile(folder, baseFileName);
% Save the variable to the .mat file on disk.
save(fullFileName, 'data');

To recall later in the command window or an m-file:

storedStructure = load(fullFileName);
data = storedStructure.data;

[Radoslav Vandzura]

I have created function for save data:

function pushbutton4_Callback(hObject, eventdata, handles)

get(handles.edit3,'data') %edit3 is tag for uitable object

and then i close the figure...

Later I need call some variable of my excel file, for example...

I have column named 'Age'. How can i call this column and do min a max age of this column?

[Image Analyst]

From the help for table:

LastName = {'Smith';'Johnson';'Williams';'Jones';'Brown'};
Age = [38;43;38;40;49];
Height = [71;69;64;67;64];
Weight = [176;163;131;133;119];
BloodPressure = [124 93; 109 77; 125 83; 117 75; 122 80];
% Create a table, T, as a container for the workspace variables.
t = table(Age,Height,Weight,BloodPressure,...
    'RowNames',LastName)
% Read from Excel file
% t = readtable(fullFileName);
% Extract all rows in the 'Age' column:
ageColumn = t{:,'Age'}
% Get the max of all the ages:
maxAge = max(ageColumn)

[Radoslav Vandzura]

yes, but I have many rows...a can not write all of them...I only need call variables (first variable, second.....) and do operations on this.

[Image Analyst]

I don't understand. The code does not depend on whether you have many or few rows. And it does do operations - you saw how I called the max() operation. Do you still have a problem with the code? If so, let's see it.

[Radoslav Vandzura]

I would like to show in graph variables which I have loaded into GUIDE (through button Load). After loading data, names of columns are in pop-up menu. But when I select some name of columns nothing is shown in graph, any axes.....I would like to do it due to analysis which i will do...but I dont know it is stored somewhere or not....because after pressing start, only one variable (ans) is shown in workspace and it is empty....I dont know why....and I think it is a reason why axes arent shown ....