How to create a PDF report with for-loop in Reporter Generator?

The format of every page in my report is identical, task of report is to load a different image in every page, i tried following code to create 5 blank chapters, but it seems doesn't work.

 NumberImage = 5;
 for i = 1: NumberImage
    ch(i) = Chapter();
    ch(i).Layout.Landscape = 1;
 end

It would be great, if i can get some tips from you.

Answer 1

[Rahul Singhal]

Below is a sample code to create a new landscape chapter for every image and add them to the report:

import mlreportgen.report.*
import mlreportgen.dom.*

rpt = Report("My Report","pdf");

NumberImage = 5;
for i = 1: NumberImage
    % Create a landscape chapter
    ch = Chapter("Images");
    ch.Layout.Landscape = true;

    % Add image to the chapter
    add(ch, Image(which("b747.jpg")));

    % Add chapter to the report
    add(rpt,ch);
  end

close(rpt);
rptview(rpt);

If your use case is just to add different images in the same landscape mode, and not to create multiple chapter for that, you can just create a single chapter before the loop, add all the images to that chapter in the loop, and then add the chapter to the report after the loop.

Hope this helps!

[Tong Wang]

Thanks, this works. By the way, i actually want to add a image to report, which is in workspace saved, how can i do this? Thanks in advance.

[Rahul Singhal]

Just create a DOM Image object by providing the image path and add it to the chapter. See mlreportgen.dom.Image.

R2017b also introduces Figure reporter which allows to take a snapshot of a MATLAB Figure window and add that snapshot to the report. See mlreportgen.report.Figure.

[Tong Wang]

Thanks for your reply, i think i didn't describe it correctly, the image is a fully new image, which is produced by my matlab program, it doesn't have a path, because i never save the image in computer. The new image just exists in workspace in the form of RGB (matrix), at the end i would like to set the image to my report directly from workspace.

[Rahul Singhal]

You will have to process the matrix to either display the image in a MATLAB figure window or to write it in an image file before adding it to the report.

• If you can display the image in the MATLAB figure window, from the matrix, using the image function (See https://www.mathworks.com/help/matlab/ref/image.html ), you can use mlreportgen.report.Figure reporter to include the figure window snapshot in the report.
• If you can write it in an external image file using imwrite function (See https://www.mathworks.com/help/matlab/ref/imwrite.html ), you can use the mlreportgen.dom.Image by providing the path of the output image file to include in the report.

[Tong Wang]

Thank you!