How to create a new variable in a data.frame based on a condition?

How to create a new variable in a data.frame based on a condition?

r dataframe

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Install Rtools on R version 3.0.2

r devtools rtools

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Fitting with ggplot2, geom_smooth and nls

r ggplot2 curve-fitting

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How to create 3D - MATLAB style - surface plots in R

r matlab plot

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Auto complete and selection of multiple values in text box shiny

r autocomplete textbox shiny

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Create Sparse Matrix from a data frame

r machine-learning sparse-matrix

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Why does "one" < 2 equal FALSE in R?

r boolean comparison boolean-logic coercion

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sparse.model.matrix loses rows in R

r matrix sparse-matrix

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r Remove parts of column name after certain characters

r

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R: ggplot and plotly axis margin won't change

r ggplot2 plotly

r