Progress Log 106 (R): Vector Arithmetic

I’m taking an edX course entitled “Introduction to R for Data Science” and all of the concepts described below come from that course. Computations are performed element-wise. As you can see, R multiplies each element in the vector with 3. This works with other mathematical operators as well. Element-wise Subtraction …

Progress Log 105 (R): Create and Name Vectors

I’m taking an edX course entitled “Introduction to R for Data Science” and all of the concepts described below come from that course. Vectors A sequence of data elements. Same basic data type. You can have character vectors, numeric vectors, logical vectors, etc. Create a Vector c() Character Vector Suppose …

Progress Log 17 (R): Proportions, Averages and Standard Deviations

I’m taking a course entitled “Data Science: Visualization” by HarvardX at edX and all of the concepts described below come from that course.   Proportions   Averages and Standard Deviations   Approximations Seven footers and the NBA   Estimating the number seven footers   How many seven footers are in …

Progress Log 16 (R): Normal Distribution; Mean (R code), Standard Deviation (R code), Standard Units (R code)

I’m taking a course entitled “Data Science: Visualization” by HarvardX at edX and all of the concepts described below come from that course.   Normal Distribution The normal distribution, also known as the bell curve and as the Gaussian distribution, is one of the most famous mathematical concepts in history. A reason for …