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  1. :Data and list manipulation
  2. :
  3. :items
  4. items(a,b,c,d,e,f)
  5. the number of items (here it's 6) in the list {a,b,c,d,e,f}
  6. :item
  7. item(3,a,b,c,d,e,f)
  8. item number 3 of the list {a,b,c,d,e,f} (hence c)
  9. :item
  10. item(3,\ll)
  11. item number 3 of the list \ll (same as <tt>\ll[3]</tt>)
  12. :item
  13. item(2..5,a,b,c,d,e,f)
  14. items number 2 to 5 of the list {a,b,c,d,e,f} (hence b,c,d,e)
  15. :item
  16. item([2,4],\ll)
  17. items number 2 and 4 of the list \ll (same as <tt>\ll[2,4]</tt>)
  18. :position
  19. position(make,do,go,make,take)
  20. number of position of the item `make' in the list
  21.     {do,go,make,take} (hence 3)
  22. :rows
  23. rows(\m)
  24. the number of rows in the matrix \m
  25. :row
  26. row(2,\m)
  27. row number 2 of the matrix \m (same as <tt>\m[2;]</tt>)
  28. :row
  29. row(2..5,\m)
  30. the submatrix of \m consisting of rows number 2 to 5 (same as <tt>\m[2..5;]</tt>)
  31. :row
  32. row([1,3],1,2,3<br>3,4,5<br>5,6,7) </td><td>the submatrix of the 3&times;3 matrix consisting of the first  and the last rows
  33. :row
  34. row(column 1 > 1 and column 2 = good,\mat)
  35. the submatrix of \mat consisting of rows where column 1 is > 1 and column 2 is the word `good'
  36. :randomitem
  37. randomitem(\list)
  38. a random item of (comma-separated) \list.
  39. :randomrow
  40. randomrow(\mat)
  41. a random row of the matrix \mat.
  42. :column
  43. column(2,\m)
  44. items of column number 2 of the matrix \m, as a comma-separated list (same as <tt>\m[;2]</tt>)
  45. :column
  46. column(2..5,\m)
  47. the submatrix of \m consisting of columns number 2 to 5 (same as <tt>\m[;2..5]</tt>)
  48. :column
  49. column([1,3],1,2,3<br>3,4,5<br>5,6,7)
  50. the submatrix of the 3&times;3 matrix consisting of the first  and the last columns
  51. :asis
  52. asis(How do you do? item(1,2,3))
  53. the string as it is, protected from transformations and conditionality.
  54. :htmlmath
  55. htmlmath(2*x^2+3*x)
  56. the best possible way to render the expressionin html way: 2x<sup>2</sup>+3x
  57. :texmath
  58. texmath(2*x^2+3*x)
  59. the TeX source of the expression
  60.