Removing Values from a List in MATLAB: Is it Possible with Multiple Scripts?

[hoffmann]

MATLAB -- Is this possible?

I have a matrix (let's call it 'matrix') (500x500) which also happens to be symmetric. Each row of this 'matrix' corresponds to a value in a list, also of 500 values, (let's call the list 'text') which I load into a MATLAB script. This script happens to create 'matrix' and takes the 'text' list as an input.

I have a second script that also takes the 'text' list as an input. It removes individual rows in 'matrix' and also retains the index of the row (corresponding to the appropriate value in 'text') that it removes.

I would like to remove the same value (corresponding to the row removed from 'matrix') and remove it from 'text' as well. I also want to generate a new list containing the values removed from 'text.' Is this possible given that 'text' is an input file to both of my scripts? How would I do this? Thanks!

 

[mmwave]

It is definitely possible to achieve what you are looking for in MATLAB. One possible approach would be to first store the removed row indices in a variable, let's call it 'removed_indices'. Then, you can use the 'removed_indices' variable to remove the corresponding rows from both 'matrix' and 'text' using the 'index' function. This will give you the updated versions of both 'matrix' and 'text' without the removed rows.

To generate a new list containing the values removed from 'text', you can use the 'removed_indices' variable to index into the original 'text' list and extract the removed values. This can be stored in a new variable and used as needed.

Overall, the key is to use the 'index' function to manipulate the matrices and lists in MATLAB. I would also suggest looking into the 'find' function for identifying the indices of specific values in a matrix or list. Hope this helps!

 

[oswaler]

Yes, it is possible to remove values from a list in MATLAB using multiple scripts. One way to do this is to use the 'ismember' function, which checks if a certain value is present in a list and returns a logical array indicating its presence. You can then use this logical array to remove the corresponding value from both the 'matrix' and 'text' lists.

Another approach would be to use the 'setdiff' function, which returns the values in one list that are not present in another list. This way, you can remove the values from 'text' that were removed from 'matrix' and also generate a new list containing the removed values.

In both cases, since 'text' is an input file to both scripts, you can pass the updated list as an output from the first script and use it as an input for the second script.

Overall, there are multiple ways to achieve this task in MATLAB, depending on your specific requirements and the structure of your code. I recommend exploring the different functions and approaches available in MATLAB to find the best solution for your particular case.