R numbers from 1 to 100

Question

Possible Duplicate    How to generate a vector containing a numeric sequence        In R  how can I get the list of numbers from 1 to 100  Other languages have a function  range  to do this  R s range does something else entirely    gt  range 1 100   1    1 100

User · Answer

If you need the construct for a quick example to play with, use the : operator.

But if you are creating a vector/range of numbers dynamically, then use seq() instead.

Let's say you are creating the vector/range of numbers from a to b with a:b, and you expect it to be an increasing series. Then, if b is evaluated to be less than a, you will get a decreasing sequence but you will never be notified about it, and your program will continue to execute with the wrong kind of input.

In this case, if you use seq(), you can set the sign of the by argument to match the direction of your sequence, and an error will be raised if they do not match. For example,

seq(a, b, -1)

will raise an error for a=2, b=6, because the coder expected a decreasing sequence.

User · Answer

Your mistake is looking for range  which gives you the range of a vector  for example   range c 10  -5  100     gives   -5 100   Instead  look at the   operator to give sequences  with a step size of one     1 100   or you can use the seq function to have a bit more control  For example     Step size of 2 seq 1  100  by 2    or     length out  desired length of the sequence seq 1  100  length out 5

[r] R numbers from 1 to 100

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