Error using - Matrix dimensions must agree.
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please I will be grateful for any help for this error:
Error using -
Matrix dimensions must agree.
Error in tvf_emd (line 136)
temp_x = temp_x-y(ind_remov_pad);
the code is below:
if flag_stopiter
imf(nimf,:)=y(ind_remov_pad);
temp_x = temp_x-y(ind_remov_pad);
break;
end
5 个评论
per isakson
2019-10-19
I tried to run your code and got
>> imf = tvf_emd( DS_DATA_ODU )
Undefined function or variable 'INST_FREQ_local'.
Error in tvf_emd (line 70)
[instAmp0,instFreq0] = INST_FREQ_local(y);
70 [instAmp0,instFreq0] = INST_FREQ_local(y);
I cannot spot the error by inspection of the code.
Yussif M. Awelisah
2019-10-19
per isakson
2019-10-19
Did you edit the question? However, to help I need INST_FREQ_local.m
Yussif M. Awelisah
2019-10-19
per isakson
2019-10-19
We wrote our comments at the same time, which explains the confusion.
采纳的回答
per isakson
2019-10-19
编辑：per isakson
2019-10-23
I get a different error. One reason for the difference in the wording is that we run different releases of Matlab(?). I run R2018b. However, more important it seems we are running different versions of your program. (Note: The line number might differ, since I have deleted some blank lines.)
>> dbstop if error
>> imf = tvf_emd( DS_DATA_ODU )
Unable to perform assignment because the size of the left side is 1-by-500 and the size of the right side is 231-by-500.
Error in tvf_emd (line 39)
imf(nimf,:)=temp_x;
39 imf(nimf,:)=temp_x;
K>> whos imf nimf temp_x
Name Size Bytes Class Attributes
imf 50x500 200000 double
nimf 1x1 8 double
temp_x 231x500 924000 double
K>> nimf
nimf =
18
This error is because you cannot overwrite one row of imf by the full matrix temp_x. The error of your question is most likely of the same kind.
The line imf(nimf,:)=temp_x; should probably be imf(nimf,:)=temp_x( some_index, : ) ;
In response to comment
If it ain't broke, don't fix it
"The original version [of tvf_emd] can be found at file exchange" Yes, I found Time varying filter based empirical mode decomposition(TVF-EMD). In the example, signal_decomposition.m, the function, tvf_emd, takes a row vector (signal) and returns a matrix. The number of rows of the output matrix depends on the input signal. There is no indication that the functions could take a matrix, i.e. many signals, as input. The documentation of tvf_emd isn't enough to make major modifications of the code - IMO.
Your goal is to make a function that takes a matrix. And returns what? Simplest first, make a wrapper. Try
>> imf_array = my_tvf_emd( DS_DATA_ODU );
>> whos imf_array DS_DATA_ODU
Name Size Bytes Class Attributes
DS_DATA_ODU 231x500 924000 double
imf_array 231x1 11129872 cell
where
function imf_array = my_tvf_emd( signals )
len = size( signals, 1 );
imf_array = cell( len, 1 );
for jj = 1 : len
imf_array{jj} = tvf_emd( signals(jj,:) );
end
end
10 个评论
Yussif M. Awelisah
2019-10-19
per isakson
2019-10-19
编辑：per isakson
2019-10-19
From that we learn
- the line imf(nimf,:)=temp_x( some_index, : ); isn't executed in your code because otherwise it had thrown an error. some_index in my answer is a placeholder for an appropriate index that you have to fill in. Only you know the intent of that line.
- you didn't respond when I told you what release I'm running.
- you didn't respond to my assumption that we are running different versions of your code
- you didn't apply the approach I proposed, namely dbstop if error and whos variables of interest at the error
Yussif M. Awelisah
2019-10-20
per isakson
2019-10-22
编辑：per isakson
2019-10-22
"run the attached version of the code" In my answer, I've done that and reported that I encountered a different error. The reason for the different errors might (long shot) be that my R2018b supports Compatible Array Sizes for Basic Operations, whereas R2015a doesn't do that.
"error can be resolved" If you can make this code run, what support are there, it would produce the expected result?
"shows only the below error" Yes, Matlab shows the first error it encounters and quits the execution. When you fixed the first error, Matlab will hit the second error. This will repeat until you fixed the last error.
per isakson
2019-10-22
I added an alternative solution to my answer.
Yussif M. Awelisah
2019-10-23
编辑：per isakson
2019-10-23
per isakson
2019-10-23
What are you trying to do?
Why not first try my code?
Do you understand what I propose?
Yussif M. Awelisah
2019-10-23
per isakson
2019-10-23
编辑：per isakson
2019-10-23
I tried to convince you not to modify tvf_emd. It's difficult and you will probably never get it right. Thus use tvf_emd as it comes from the FEX.
As an alternative I proposed a Wrapper function, which I called my_tvf_emd. Your comment (2+ hour ago) doesn't show that you tried my_tvf_emd. On the contrary you copied and modified pieces of my code.
The line (the first line of your script)
imf_array = tvf_emd( DS_DATA_ODU )
will certainly cause an error. We know that by now. The function, tvf_emd, expects a vector. Respect that.
Do exactly the following steps
- Create the wrapper, my_tvf_emd. Copy the code below the word "where" to an empty editor "document" and save it to a file named my_tvf_emd.m
- Make sure that tvf_emd invokes the file from the fex-submission. Not one of your modified versions. Run which tvf_emd -all The fex version shall appear at the top of the result.
- In the command window run (I used >> to indicate command window.)
imf_array = my_tvf_emd( DS_DATA_ODU );
whos imf_array DS_DATA_ODU
Yussif M. Awelisah
2019-10-23
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