Ones function printing out

Question

0 个投票

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 个评论
显示 9更早的评论隐藏 9更早的评论

VBBV 2024-2-25

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 2024-2-25

@VBBV

That will not make any difference. mnist.mat is a valid directory name.

请先登录，再进行评论。

请先登录，再回答此问题。

Follow Question

Answer 1

Walter Roberson 2024-2-24

1 个投票

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 个评论
显示无隐藏无

Zachary David 2024-2-24

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 2024-2-24

在 MATLAB Online 中打开

At the end of the code, insert

if nargout == 0
    clear X1;
end

请先登录，再进行评论。

Answer 2

Star Strider 2024-2-24

在 MATLAB Online 中打开

0 个投票

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 个评论
显示 4更早的评论隐藏 4更早的评论

Zachary David 2024-2-24

编辑：Zachary David 2024-2-24

i was thinking it might be coming from somewhere else too. Maybe my recycling bin

Star Strider 2024-2-24

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.

请先登录，再进行评论。

Ones function printing out

11 个评论
显示 9更早的评论隐藏 9更早的评论

回答（2 个）

2 个评论
显示无隐藏无

6 个评论
显示 4更早的评论隐藏 4更早的评论

类别

产品

版本

标签

Community Treasure Hunt

Ones function printing out

11 个评论 显示 9更早的评论 隐藏 9更早的评论

回答（2 个）

2 个评论 显示 无 隐藏 无

6 个评论 显示 4更早的评论 隐藏 4更早的评论

类别

产品

版本

标签

另请参阅

Community Treasure Hunt

11 个评论
显示 9更早的评论隐藏 9更早的评论

2 个评论
显示无隐藏无

6 个评论
显示 4更早的评论隐藏 4更早的评论