How can I select a folder to save a set of images to?

I have been able to plot the centroids to a set of images and have been able to save them using a fixed filepath. I would now like a window to open up so a user could select which folder they would like to save the images to (there are 240 images so would like to categorise them). Is there a way I could alter my code to do this?

bac_pics = tiffread('bacvid.tif'); %imports the tif file

prompt_folder = 'Select a file to save the images to';

prompt_file_name = 'What would you like the image file to be called? ';

[~,locName] = fileparts(input(prompt_file_name),'s')); %saves the name of the image as dictated by the user

for i = 1:numel(bac_pics) %sets up a loop to run for every frame in the video 
    bac_frame = bac_pics(i).data; %for each loop the fram is named bac_frame

    dimensions = size(bac_frame); %finds the sizes of the image     

    log_filt = fspecial('log'); %creates a filter in the form of a Lorentzian of a Gaussian 

    bac_frame_filt = imfilter(bac_frame, log_filt); %puts the filter over the image

    bw_bac = im2bw(bac_frame_filt , graythresh(bac_frame)); %the image is converted into a bianry image using a limit obatined from a function that uses Otsu's Method 

    eroder = strel('line', 1, 90); %creates a circular structring element to erode the image later with radius 1

    bw_bac_eroded = imopen(bw_bac, eroder); %gets rid of the connecting parts of bacteria

    imshow(bac_frame)

    baccenter = regionprops(bw_bac_eroded, 'Centroid');%finds the center of each cell
    centroids = cat(1, baccenter.Centroid);
    centroiddata = regionprops('table', bw_bac_eroded, 'Centroid');       

    hold on
    plot(centroids(:,1),centroids(:,2), 'b*') 
    hold off

    locPath2 = 'C:\Users\nathan\Documents\MATLAB\Tables and Pictures'; %dictates saving location
    locFull2 = fullfile(locPath2,[locName, [num2str(i),'.jpg']]);
    saveas(gcf,locFull2)

end

Answer 1

[Stephen23]

Use uigetdir.

Or perhaps uiputfile. Or whatever suits your task needs: go to the bottom of any MATLAB help page and you will find links to similar functions. Use them!

Oh, and always use fullfile to generate the full file name from a file path and file name:

 [FileName,PathName] = uiputfile(...)
 filepath = fullfile(PathName,FileName)

[Nathan Costin]

Thank you, I used the uigetdir and it works!