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Matlab unique two columns

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matlab unique two columns

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Sort matrix based on unique values in one column

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Sort matrix based on unique values in one column. Ida Rosendahl on 14 Apr Vote 0. Commented: chaman lal dewangan on 18 Jan Accepted Answer: Stephen Cobeldick.

Hi guys. I can't seem to overcome my problem. I have a matrix with 5 columns and a lot of rows. I need to sort the whole matrix based on unique values in column 1. How do I do that? So I need to find the unique values its a timestamp from my experiment in column one and also the corresponding values in the rest of the columns and everything else needs to be deleted.

Accepted Answer. Stephen Cobeldick on 14 Apr Vote Cancel Copy to Clipboard. Edited: Stephen Cobeldick on 14 Apr You can even do the same thing with unique to get the rows corresponding to unique values in the first column:.Sign in to comment. Sign in to answer this question. Unable to complete the action because of changes made to the page.

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Benvaulter on 22 Mar Vote 0. Edited: Jan on 23 Mar Sign in to comment. Sign in to answer this question. Unable to complete the action because of changes made to the page. Reload the page to see its updated state. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location.

Toggle Main Navigation. Search Answers Clear Filters. Answers Support MathWorks. Search Support Clear Filters. Support Answers MathWorks. Search MathWorks. MathWorks Answers Support. Open Mobile Search. Trial software. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. Unique rows of 2 cells with 2 columns each.

BdS on 13 Sep Vote 0. Commented: Guillaume on 18 Sep Accepted Answer: Matt J. I have got 2 cells with 2 columns each:. IdxMembers x2.

matlab unique two columns

IdxMembers2 x2. I am looking of the unique values of each cells in form of nr. I tried the following 2 codes:. I get the unique values in dim nr. However, I would like get the output with the second column.

Unique rows of 2 cells with 2 columns each.

Do you have any suggestions? Cancel Copy to Clipboard.Documentation Help Center. C is in sorted order. If A is a table or timetable, then unique returns the unique rows in A in sorted order. For timetables, unique takes row times and row values into account when determining whether rows are unique, and sorts the output timetable C by row times.

You must specify A and optionally can specify setOrder or occurrence. The 'legacy' option does not support categorical arrays, datetime arrays, duration arrays, calendarDuration arrays, tables, or timetables. Find the unique rows of A. Find the table rows with unique values in the first variable Age. If you only want one table variable to contain unique values, you can use the indices returned by unique to extract those rows from the table.

Find the unique rows of A based on the data in the first two columns. Specify three outputs to return the index vectors ia and ic.

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Use ia to index into A and retrieve the rows that have unique combinations of elements in the first two columns. Find the unique elements in a vector and then use accumarray to count the number of times each unique element appears. Find the unique elements in the vector.

Return the index vectors ia and ic. Count the number of times each element in C appears in a.

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Specify ic as the first input to accumarray and 1 as the second input so that the function counts repeated subscripts in ic. Summarize the results. Use the setOrder argument to specify the ordering of the values in C. Specify 'stable' if you want the values in C to have the same order as in A.

matlab unique two columns

Create a vector x. Obtain a second vector y by transforming and untransforming x. This transformation introduces round-off differences in y.

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Verify that x and y are not identical by taking the difference.Documentation Help Center. C is in sorted order. If A is a table or timetable, then unique returns the unique rows in A in sorted order. For timetables, unique takes row times and row values into account when determining whether rows are unique, and sorts the output timetable C by row times.

You must specify A and optionally can specify setOrder or occurrence. The 'legacy' option does not support categorical arrays, datetime arrays, duration arrays, calendarDuration arrays, tables, or timetables.

Find the unique rows of A. Find the table rows with unique values in the first variable Age. If you only want one table variable to contain unique values, you can use the indices returned by unique to extract those rows from the table.

Find the unique rows of A based on the data in the first two columns. Specify three outputs to return the index vectors ia and ic. Use ia to index into A and retrieve the rows that have unique combinations of elements in the first two columns. Find the unique elements in a vector and then use accumarray to count the number of times each unique element appears. Find the unique elements in the vector.

Return the index vectors ia and ic. Count the number of times each element in C appears in a. Specify ic as the first input to accumarray and 1 as the second input so that the function counts repeated subscripts in ic.

Summarize the results. Use the setOrder argument to specify the ordering of the values in C. Specify 'stable' if you want the values in C to have the same order as in A.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How can I apply the unique function on 2 columns [column 3 and 4] such that they will return the value '3' and '2'.

Take the first row for example. Second column will contain how many times it occurred in that particular column. Note that single occurrences will not be displayed.

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Unique Function based on 2 columns [Instead of rows]. RDG on 9 Apr Vote 0. Accepted Answer: Azzi Abdelmalek. Suppose, I have a cell array, a, with contents as such:. How can I apply the 'unique' function on 2 columns [column 3 and 4] such that they will return the value '3' and '2'. Solution proposed:. However, when the arrangement of the contents is changed, for eg. Cedric Wannaz on 9 Apr Cancel Copy to Clipboard. No, this code assumes blocks of similar rows for cols 3 and 4as it seems to be the case in your first example.

Accepted Answer. Azzi Abdelmalek on 9 Apr Vote 2.


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