Statistical Programming with R

Hi,
Now it is time to start statistical analysis.
Come let us go.

What is a data frame



A data frame is used for storing data as tables. It is a list of arrays of equal length. For example, the following variable df is a data frame containing three vectors n, s, b.
> n = c(21, 31, 52)
> s = c("ada", "c", "b")
> b = c(TRUE, TRUE, FALSE)
> df = data.frame(n, s, b)       # df is a data frame 
 
This can be further used for analysis and plotting.
 
What is qualitative data
 
A dataset can be known as qualitative or categorical if the values  belong to a collection of known defined non-overlapping classes. Common examples include student letter grade (A, B, C, D or F), commercial bond rating (AAA, AAB, ...) and consumer clothing shoe sizes (1, 2, 3, ...).

Comments

  1. Sergey26 March 2019 at 10:38

    Ukrainian software developers have a strong skill set, they are tech savvy, up to date with recent innovations and have an independent thinking. Moreover, Ukraine offers intermediate prices of $25-$49/hour for its software developers in comparison to the engineers from other eastern European countries. Learn more about Ukrainian software developers.

    ReplyDelete

Post a Comment

Popular posts from this blog

Introduction

Dear All, R is really a useful tool for all  kind of users..more intelligent one. More support for Graphics and Statistical analysis. R console will look like this. > 1 + 2 [1] 3 Variables can be initialized like this > y = 1 > y [1] 1  Vectors can be created like tis s(2, 3, 5) [1] 2 3 5
Read more

R Array Operations

Hi All, See the Array operations > a = c(1, 2, 5, 4) > b = c(1,1, 4, 8) Then, if we multiply a by 5, we would get a vector with each of its elements multiplied by 5. > 5  *  a [1]  5 10 25 20    The same can be done with other arithmetic operators.   > a + b  > a  -  b > a  *  b > a / b  Recycling Rule If two arrrays are of unequal length, the shorter one will be recycled in order to match the longer vector. > w = c(10, 20, 30) > v = c(1, 2, 3, 4, 5, 6, 7, 8, 10) > w + v [1] 11 22 33 14 25 36 17 28 40     
Read more