Ones function printing out

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Zachary David
Zachary David 2024 年 2 月 24 日
コメント済み: Walter Roberson 2024 年 2 月 25 日
Can anyone tell me why my ones function is causeing my code to print even though it has a semi colon? I commented everything else out to narrow it down to the ones function. I already reinstalled matlab but nothing seems to be working
getX1();
Error using load
Unable to find file or directory 'mnist.mat'.

Error in solution>getX1 (line 7)
load('mnist.mat', 'images'); % Load 'images' variable from 'mnist.mat'
function X1 = getX1()
clc;
close;
clear;
load('mnist.mat', 'images'); % Load 'images' variable from 'mnist.mat'
num_images = size(images, 1);
image_size = 26 * 26; % Adjusted image size
X1 = ones(num_images, image_size + 1); % Initialize X matrix with bias column
for i = 1:num_images
%Crop 1-pixel border
image_cropped = images(i, 2:end-1, 2:end-1);
%Flatten image, normalize, and append 1
image_flat = double(reshape(image_cropped, 1, [])) / 255;
image_with_bias = [image_flat, 1];
% Update X matrix
X1(i, :) = image_with_bias;
end
% size of X matrix
fprintf('Size of X matrix: %d rows x %d columns\n', size(X1, 1), size(X1, 2));
end
  11 件のコメント
VBBV
VBBV 2024 年 2 月 25 日
It seems you are running the script file getX1.m from a wierd location. Change its location to a different folder and run again
The path from the screenshot shows something like this
C:\users\zach1\OneDrive\...\Project1\mnist.mat\getX1.m
mnist.mat >> change this to a different name without a dot and check whether you still get that issue
Walter Roberson
Walter Roberson 2024 年 2 月 25 日
That will not make any difference. mnist.mat is a valid directory name.

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回答 (2 件)

Walter Roberson
Walter Roberson 2024 年 2 月 24 日
The ones is the output of your function. You are running the function by pressing the green Run button, which executes the function which returns X1 which then gets printed out automatically.
  2 件のコメント
Zachary David
Zachary David 2024 年 2 月 24 日
I know it is the output but why would it be printed out automatically when im not asking for that to happen. How do i stop it from printing out?
Walter Roberson
Walter Roberson 2024 年 2 月 24 日
At the end of the code, insert
if nargout == 0
clear X1;
end

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Star Strider
Star Strider 2024 年 2 月 24 日
The fprintf call will execute and print even if there is a semicolon at the end of that call.
X1 = rand(3,5);
fprintf('Size of X matrix: %d rows x %d columns\n', size(X1, 1), size(X1, 2));
Size of X matrix: 3 rows x 5 columns
Are you seeing that or something else?
.
  6 件のコメント
Zachary David
Zachary David 2024 年 2 月 24 日
編集済み: Zachary David 2024 年 2 月 24 日
i was thinking it might be coming from somewhere else too. Maybe my recycling bin
Star Strider
Star Strider 2024 年 2 月 24 日
It’s coming from somewhere else in your code. I doubt if anything in the recycling bin is in any way active.
I don’t know how long your code is, however in the past when I needed to isolate something like that, I inserted:
fprintf('Stopped on line %d\n', line_nr)
return
and then moved those lines to various points in my code and then looked to see if the problem recurred. (I inserted the line number manually.) That helped me find the problem.
There are a collection of debugging tools available, however they might not be helpful in tracking down a line that prints a matrix, and that’s all you want to do at the moment.

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