Create a function and plot data

Hi All, here is what I am trying to achive:

1. A function which takes the input as 2 folder names and then there are .mat files for each day inside of second folder

Example: Function (Main_Folder,Sub_Folder,Day1)

1. .mat files are for a day each so for this function what I am trying to do is to pick a new file that comes into the folder. Example: Once the data for Day1, Day2 is taken already and today comes a new file Day3 it needs to be picked by the function not Day1 and Day2 again
2. .mat files are a nested 1x1 struct like this

Day1.Name1.Table1 = array2table(rand(7,5));
Day1.Name1.Table2 = array2table(rand(7,5));
Day1.Name1.Table3 = array2table(rand(7,5));

3. Inside of these Tables: 1,2,3. To access the Tables I use this code

C = struct2cell(S);
T = [C{:}]
T1 = vertcat(T.Table1)
T2 = vertcat(T.Table2)
T3 = vertcat(T.Table3)

4. Then I do a comparison for one of the variable from each of these tables and get the details in a different table

Name1_T1 = T1(strcmp(T1.Var1, 'A'), :);
Name1_T2 = T2(strcmp(T2.Var1, 'A'), :);
Name1_T3 = T3(strcmp(T3.Var1, 'A'), :);

5. Then I get a value for variable2. For this variable I would like to append the value for each day's file which I haven't figured out yet. So, let's say Variable2 had value of 40 for day1, then 50 for day2 and 60 for day3 and so on

Name1_T1_Var2 = Name1_T1.Var2;
Name1_T1_Time = Name1_T1.Time;

6. Finally, I am trying for this function to build like a trent plot which will have value for each day

plot (Name1_T1_Time,Name1_T1_Var2)

7. So, basically I am trying to build a function that takes these inputs and dynamically pick each file that comes every day in the folder and then plot the data for Variable 2 (One point for each day - plot should still have previous day's value but also able to append new day's value)

Here is what I am not able to figure out:

1. How to build a function in such a way that can work dynamically and can be grown for more than 1 variable
2. Plot for each day with new values coming in

Can someone please help me out?

[MattC]

Hi @Stephen23, thanks for helping me with :https://www.mathworks.com/matlabcentral/answers/1920035-how-to-loop-over-a-structure-in-matlab?s_tid=srchtitle. I am trying to build a function around this and fetch the data as well whenever there is a new data. Can you please help me if this is possible?

Answer 1

[Dinesh]

Hello!

As per my understanding you want to execute a function whenever new data i.e., day(n) file comes in.

This is a case of an event and whenever the event occurs you can trigger a function.

So, you can write a custom event handler and, in that call-back, specify what all things you want to do.

You can refer the following MATLAB documentation for more details

1. MATLAB documentation for writing and running event handler function
2. MATLAB documentation for create and execute callback functions