Recent questions tagged Subset

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subset - Subsetting R array: dimension lost when its length is 1

When subsetting arrays, R behaves differently depending on whether one of the dimensions is of length 1 or not. If ... ? Some flag to set? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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subset - Subsetting a dataset by selecting variables based on keywords in their name in SAS

I hope someone can help. I have a large dataset imported to SAS with thousands of variables. I want to ... in using an assignment statement? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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subset - Return rows establishing a "closest value to" in R

I have a data frame with different IDs and I want to make a subgroup in which: for each ID I will only ... use instead? Thank you in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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subset - Pull nth Day of Month in XTS in R

My questions is closely related to the one asked here: Pull Return from first business day of the month from XTS object ... . How can I do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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299 views

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subset - Passing empty index in R

Say I want to subset a vector a, I can pass the value of the indices to subset in a variable e.g. a[ ... be something better than 1:length(a). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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subset - R keep rows with at least one column greater than value

Say I have a data frame with a few hundred rows and a few hundred columns. How would I keep rows that have at least one value greater than 10? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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subset - R gotcha: logical-and operator for combining conditions is & not &&

Why doesn't subset() work with a logical and && operator combining two conditions? > subset(tt, (customer_id==177 ... - my dataset is huge) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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