dlmwrite/dlmread function help ?
조회 수: 4 (최근 30일)
이전 댓글 표시
I had a matrix
A = [data1 data2 data3];
B = [data4 data5];
data1,data2,....data5 are calculated or exported from excel files, these some data are randomly generated so I want to store data data2 and data4 in a matrix AA when I run it first and then run in 2nd time stored in BB. How to use dlmwrite without creating text file or creating with text file ?
댓글 수: 2
Jan
2017년 12월 1일
"How to use dlmwrite without creating text file or creating with text file": This is not clear. It is the purpose of dlmwrite to create a file, therefore it is impossible to use it without creating a file. What is the actual problem?
답변 (1개)
per isakson
2017년 12월 1일
편집: per isakson
2017년 12월 1일
- dlmwrite writes to a text file. That's the purpose and you cannot avoid it.
- "matrix AA [...] BB" see TUTORIAL: Why Variables Should Not Be Named Dynamically
- the results could be stored in a cell array, a structure array, a table or ... . There are many alternatives.
In response to comment
This small experiment illustrates how to store a matrix to a text file and restore the matrix from the text file. In this case, there will be a precision loss, however, you may specify the precision that dlmwrite shall use.
Create a matrix
>> A = rand( 3, 5 )
A =
0.8147 0.9134 0.2785 0.9649 0.9572
0.9058 0.6324 0.5469 0.1576 0.4854
0.1270 0.0975 0.9575 0.9706 0.8003
store the matrix data to a text file
>> dlmwrite('file_with_data_of_A.txt', A )
inspect the content of the text file
>> type file_with_data_of_A.txt
0.81472,0.91338,0.2785,0.96489,0.95717
0.90579,0.63236,0.54688,0.15761,0.48538
0.12699,0.09754,0.95751,0.97059,0.80028
and finally, restore the matrix
>> B = dlmread('file_with_data_of_A.txt')
B =
0.8147 0.9134 0.2785 0.9649 0.9572
0.9058 0.6324 0.5469 0.1576 0.4854
0.1270 0.0975 0.9575 0.9706 0.8003
>>
댓글 수: 6
per isakson
2017년 12월 1일
편집: per isakson
2017년 12월 1일
See the addendum of my answer. I might have missed your intention of introducing B
참고 항목
카테고리
Help Center 및 File Exchange에서 Text Files에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!