Replace all values in a matrix

X[X < .1] <- 0

(or NA, although 0 sounds more appropriate in this case.)

Matrices are just vectors with dimensions, so you can treat them like a vector when you assign to them. In this case, you’re creating a boolean vector over X that indicates the small values, and it assigns the right-hand-side to each element that’s TRUE.

Related Contents:

  1. Replace specific characters within strings
  2. How to replace NA values in a table for selected columns
  3. Replace NA in column with value in adjacent column
  4. Replace all particular values in a data frame
  5. Match values in data frame with values in another data frame and replace former with a corresponding pattern from the other data frame
  6. Remove all text before colon
  7. How to replace NaN value with zero in a huge data frame?
  8. Replace given value in vector
  9. R: Replace multiple values in multiple columns of dataframes with NA
  10. Replace values in a vector based on another vector
  11. Replace a value NA with the value from another column in R
  12. Replacing occurrences of a number in multiple columns of data frame with another value in R
  13. Replace in a factor column
  14. Replace empty values with value from other column in a dataframe
  15. How to convert Excel date format to proper date in R
  16. Multirow axis labels with nested grouping variables
  17. How do I arrange a variable list of plots using grid.arrange?
  18. Select the first and last row by group in a data frame
  19. Horizontal/Vertical Line in plotly
  20. Dummy variables from a string variable
  21. Proper/fastest way to reshape a data.table
  22. What are the main differences between R data files?
  23. readRDS(file) in R
  24. How do you order the fill-colours within ggplot2 geom_bar
  25. ggplot2 0.9.0 automatically dropping unused factor levels from plot legend?
  26. How do I change the formatting of numbers on an axis with ggplot? [duplicate]
  27. Code to import data from a Stack overflow query into R
  28. Changing whisker definition in geom_boxplot
  29. Non-equi join using data.table: column missing from the output
  30. How to add different lines for facets
  31. Using lists inside data.table columns
  32. Changing facet label to math formula in ggplot2
  33. backtransform `scale()` for plotting
  34. Remove all of x axis labels in ggplot [duplicate]
  35. ggmap Error: GeomRasterAnn was built with an incompatible version of ggproto
  36. Merge or combine by rownames
  37. General suggestions for debugging in R
  38. Plot over multiple pages
  39. ggplot, drawing multiple lines across facets
  40. Add secondary X axis labels to ggplot with one X axis
  41. How to convert time (mm:ss) to decimal form in R
  42. R ifelse statement
  43. Split a string by any number of spaces
  44. Changing Million/Billion abbreviations into actual numbers? ie. 5.12M -> 5,120,000 [duplicate]
  45. Using ifelse in R
  46. Library is not writable
  47. How to facet a plot_ly() chart?
  48. Call a function from c++ via environment Rcpp
  49. Selecting only unique values from a comma separated string [duplicate]
  50. Passing a variable name to a function in R

Leave a Comment