We provide effective and economically affordable training courses for R and Python, Click here for more details and course registration ! When a list is created in Python, the order of its element contained can be sorted in alphabetical order later. There are mainly two functions for sorting a list in Python. sort() function will sort a list’s elements permanently. If you just want to sort a list temporarily, you can use sorted() function. The Read more…
We provide effective and economically affordable training courses for R and Python, Click here for more details and course registration ! A Box plot shows descriptive statistics of a continuous with a box and whispers. Five statistics of the variable, namely, the minimum and the maximum, the median, and the lower quantile and upper quantile are depicted in the plot. A violin plot shows a smoothed nonparametric violin curve of a continuous variable. Combination of Read more…
We provide effective and economically affordable training courses for R and Python, Click here for more details and course registration ! Histogram is a type of graph that shows the distribution of a continuous variable. The range of value of the variable is divided into parts (range), then the frequency for each bin is plotted. In R, with ggplot2 package, function geom_histogram() can be used to plot histograms. Histogram can be a simple graph using Read more…
We provide effective and economically affordable training courses for R and Python, Click here for more details and course registration ! Barcharts can be used to plot the frequency of a single categorical variable, or illustrate the cross relationship between two or more categorical variables. In R programming, function geom_bar() from ggplot2 package can easily create simple barcharts, stacked or grouped barcharts. The following codes show creation of different barcharts, using a virtual dataset “grade”. Read more…
Click her for course registration ! Wilson, the founder of rdatacode.com, was educated towards master degrees in Economics and Logistics and bachelor degree in Engineering. Wilson is now living in Norway, and has had over 10 years experience in working with data analysis at research center in Norway. Wilson’s main expertise lies in statistics, data analysis using R and Python in general, statistical modeling using R at basic and intermediate level. In recent years, Wilson Read more…
For online Python training registration, click here ! Python has been regarded as one the most used programming languages in the last decade. With the development of AI, Python’s popularity remains even stronger. Python’s practicability lies not only in general data analysis, but also in web building, machine learning, deep learning, and artificial intelligence. Its language structure is easy to start, and was thought to be significantly easier compared with compiled language like C++. In Read more…
Click here for online course registration ! R is a popular programming language, It is free and open source. R has been widely used in the field of statistical data analysis, econometrics, machine learning , just name a few in the last almost three decades. R is regarded as the easy-to-use and easy-to-learn statistics software, as well as its abundance of packages in almost all the areas in data science. In this course, we provide Read more…
In R programming, function aggregate() provides an easy way to calculate summary statistics of variables by specific groups in a data frame.
The normality assumption in linear regression is necessary to ensure the estimates of parameters are unbiased and the hypothesis testing is correct. It states that for the fixed or given values of explanatory variables, the dependent variables are normally distributed around the mean 0. It is equivalent to say that the residuals after model estimation follow a normal distribution with the mean 0.
Dictionary is a data structure type in Python. One reason for why Python is so popular among programmers is that dictionary provides an useful and effective way to store key-value pairs information. When functions in Python carry out some tasks, it can return required information to a dictionary.