Help displaying a formatted matrix to the command window

43 次查看（过去 30 天）

Brenden Epps 2012-6-5

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40351-help-displaying-a-formatted-matrix-to-the-command-window

编辑： Stephen23 2018-10-10

Hi all, this seems like a simple question, but sprintf(...) doesn't do the trick. Is there an EASY way to display a matrix in the command window with a specified number of digits of precision?

EXAMPLE:

>> x = rand(3,2) - 0.5

x =

   -0.3810   -0.1596
   -0.0016    0.0853
    0.4597   -0.2762

>> format long >> x

x =

-0.381002318441623  -0.159614273333867
-0.001635948017857   0.085267750979777
 0.459743958516081  -0.276188060508863

How do I show x with, say, 6 digits of precision (as in below)??

-0.381002  -0.159614
-0.001635   0.085267
 0.459743  -0.276188

I'm sure one could write a code that figured out the size of x and then used sprintf to create the desired output. Does this code exist?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Brenden Epps 2012-6-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40351-help-displaying-a-formatted-matrix-to-the-command-window#answer_50061

I have created a function called DISPN that answers this question.

http://www.mathworks.com/matlabcentral/fileexchange/37025

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

更多回答（2 个）

Oleg Komarov 2012-6-5

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40351-help-displaying-a-formatted-matrix-to-the-command-window#answer_49975

在 MATLAB Online 中打开

Please read more carefully the documentation of sprintf(), it DOES the trick:

sprintf('%.6f %.6f\n',rand(3,2))

Edited

Now, if you wanna make the number of columns adjust automatically, then:

A = randn(3,9);
sprintf([repmat('%10.6f',1,size(A,2)) '\n'],A)

Unfortunately, there's some learning curve in format customization.

7 个评论
显示 5更早的评论隐藏 5更早的评论

Anton 2018-10-10

It seems that this one transposes my matrix in the process though

Stephen23 2018-10-10

编辑：Stephen23 2018-10-10

在 MATLAB Online 中打开

@Anton: yes, all of the above examples should transpose the array, like this:

fprintf(...,A.')

The fprintf help explains that it "...applies the formatSpec to all elements of arrays A1,... An in column order, and writes the data..." (emphasis added).

请先登录，再进行评论。