How to create a frequency table using a list of string values

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Diana Krupnik 2018-12-6

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评论： Star Strider 2018-12-9

Hello,

I have a list of 6,057,936 string values, some are unique, many are repeated multiple times. I need to create a table that lists each unique string (likely 1,000-2,000), as well as the number of times this string occurs. Could anyone help me to do this in Matlab?

Thank you,

Diana

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Star Strider 2018-12-6

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I would use unique and accumarray. An example is given in the documentation section Count of Unique Elements (link).

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Diana Krupnik 2018-12-9

This is a great idea, but for my dataset (text string array) accumarray was not working unfortunately. What did work was the summary function. It returned fields for categories (same result as unique) as well as counts.

Thanks again,

Diana

Star Strider 2018-12-9

As always, my pleasure.

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