Okay so in our programming the summary and SDR pension so summary to show us descriptive statistics in a faster way and then SDR functions will show us a data structure of data column of the whole data set. So let's see I can use the summary summary, data Zeppelin. Again all the common ah this descriptive statistics. I can also use str data set per line structure. Okay, so changing changes to str so I will get a structure of this video by a column here okay, I can also use our summary data, SDR data, ah, I will say these are summary and str is a faster way to get other popular descriptive statistics that say the mean the median, the mean, the quota, quota and the mass and then the structure of the variable of the data set