1 00:00:01,570 --> 00:00:03,950 ‫So let us look at some basic things first. 2 00:00:05,740 --> 00:00:09,810 ‫In this clip window if you read again two plus a 3 00:00:12,620 --> 00:00:20,780 ‫and you run it so to run a query you have to press control plus enter on a Windows machine or command 4 00:00:20,820 --> 00:00:24,680 ‫plus a return on a Mac machine. 5 00:00:24,720 --> 00:00:32,430 ‫You can see that command that we wrote in the script window is replicated in the control window and 6 00:00:32,430 --> 00:00:40,480 ‫it is run and we get the result seven seven is shown in the control window only. 7 00:00:40,920 --> 00:00:45,740 ‫Many times we want to enter comment when we are writing the script. 8 00:00:45,780 --> 00:00:52,730 ‫So if you have done some programming in C C++ Java you probably would know about command to write comment 9 00:00:52,740 --> 00:00:53,400 ‫and are. 10 00:00:53,670 --> 00:01:01,310 ‫We use a hashtag or a pound symbol to put hash tag and write anything in front of it. 11 00:01:06,580 --> 00:01:12,600 ‫When you select both these lines and render only the first line will give your output. 12 00:01:12,650 --> 00:01:18,920 ‫Second line will not give you any output because that a command for those who are not from programming 13 00:01:18,920 --> 00:01:21,700 ‫background or who are not familiar with comment. 14 00:01:21,770 --> 00:01:28,400 ‫Comments are basically used to add information in your code so whenever someone else looks at that code 15 00:01:29,180 --> 00:01:36,560 ‫knows about what you have written in that piece of code that part of the code which is commented will 16 00:01:36,560 --> 00:01:37,640 ‫not be done. 17 00:01:37,700 --> 00:01:44,940 ‫That is when you run your whole code that will not have any impact on the output because it will not 18 00:01:44,940 --> 00:01:47,760 ‫be executed even in art. 19 00:01:48,060 --> 00:01:54,270 ‫While doing analysis if you want to share your analysis with someone else it is advisable that you put 20 00:01:54,540 --> 00:01:59,340 ‫comment before you start every different part of code. 21 00:01:59,670 --> 00:02:07,320 ‫You can see the format and differences in which you are writing in the script window and it is displayed 22 00:02:07,320 --> 00:02:08,250 ‫in the console window. 23 00:02:09,530 --> 00:02:16,990 ‫You can change this font and the theme of these windows you can go to Tools and select Global Options. 24 00:02:19,280 --> 00:02:28,040 ‫In this window go to appearance and select the font size and default that you would like to use. 25 00:02:28,040 --> 00:02:33,630 ‫You can also select a team too. 26 00:02:33,740 --> 00:02:39,210 ‫All these are options available said it as you like it to be then click on okay. 27 00:02:43,830 --> 00:02:51,410 ‫You can also give output in the console or textual output just like we used to do in programming language 28 00:02:51,840 --> 00:02:56,780 ‫using print command a print within bracket. 29 00:02:58,810 --> 00:03:05,170 ‫And double quotation marks whatever message you write will come out as output. 30 00:03:13,420 --> 00:03:17,430 ‫Remember this shortcut to run a command is control enter. 31 00:03:17,920 --> 00:03:22,590 ‫Once you are done with your analysis you have to clear the console. 32 00:03:22,600 --> 00:03:31,930 ‫The variables that do have the shortcut for that as you press control plus l this will clear the console. 33 00:03:32,080 --> 00:03:36,100 ‫So you can see once you play control plus all the console is cleared out. 34 00:03:38,280 --> 00:03:45,870 ‫Let us learn how to create variables and assign values in those variables to create a variable. 35 00:03:45,970 --> 00:03:49,660 ‫We'll be using assignment operator so we'll write X 36 00:03:53,470 --> 00:04:03,030 ‫and this is the assignment operator Lisbon sign and a hyphen or dash and this is that as x gets set 37 00:04:03,030 --> 00:04:06,760 ‫to and you run it. 38 00:04:06,760 --> 00:04:13,400 ‫So in the control window you can see this commander's run on the data inside. 39 00:04:13,440 --> 00:04:18,150 ‫You can see a variable called X is created and it has value too. 40 00:04:19,040 --> 00:04:20,970 ‫So this is the use of this window. 41 00:04:21,030 --> 00:04:28,320 ‫It will show all the variables all the data that you are using in your workspace to change the value 42 00:04:28,320 --> 00:04:29,110 ‫in this variable. 43 00:04:29,130 --> 00:04:31,950 ‫You can again write X gets three 44 00:04:36,190 --> 00:04:40,610 ‫you can see on the right the value in X a change to three. 45 00:04:40,800 --> 00:04:45,610 ‫You can also use is equal to sign but that is not common practice. 46 00:04:45,720 --> 00:04:51,120 ‫Whenever you are writing an R if you use is equal to sign it is frowned upon. 47 00:04:51,120 --> 00:04:58,500 ‫So it is advisable that you use the assignment operator which is less than sane and then a hyphen to 48 00:04:58,500 --> 00:05:00,900 ‫bring this variable in the console. 49 00:05:00,900 --> 00:05:04,330 ‫You can just write the name of this variable. 50 00:05:04,770 --> 00:05:15,140 ‫You can see the value stored in X is the return by the system if you want to enter multiple values within 51 00:05:15,140 --> 00:05:16,550 ‫a single variable. 52 00:05:17,760 --> 00:05:24,660 ‫That is if your variable is an array of numbers to do the relate y get 53 00:05:27,330 --> 00:05:37,150 ‫here we'll be using the concatenation operator which is C C and within bracket we can edit as many values 54 00:05:37,210 --> 00:05:38,820 ‫separated by commas. 55 00:05:38,890 --> 00:05:40,540 ‫So one two three four five. 56 00:05:43,010 --> 00:05:47,570 ‫We done this Come on you can see why variable is also created. 57 00:05:47,840 --> 00:05:52,430 ‫It is an area of numbers containing values from 1 to 5. 58 00:05:53,750 --> 00:06:04,170 ‫Instead of using this concatenation operator denoted by C if you have see the numbers only do see creation 59 00:06:04,240 --> 00:06:06,790 ‫there is another method why get 60 00:06:10,160 --> 00:06:11,220 ‫one to 10. 61 00:06:11,240 --> 00:06:17,410 ‫So 1 you write colon and then 10 if you run this command. 62 00:06:17,510 --> 00:06:21,720 ‫Norway has 10 values from 1 to 10. 63 00:06:21,800 --> 00:06:25,250 ‫2 to do C creation you can use 1 to 10 64 00:06:28,250 --> 00:06:29,920 ‫within a single command line. 65 00:06:30,050 --> 00:06:37,040 ‫You can do multiple assignments also if you want to assign same value to accent way you can write X 66 00:06:37,310 --> 00:06:38,110 ‫gets y 67 00:06:41,570 --> 00:06:45,620 ‫and way get 1 2 in 68 00:06:49,180 --> 00:06:53,820 ‫so both of these will get the same values in any single command line. 69 00:06:53,930 --> 00:07:01,160 ‫If you are familiar with metrics mathematics or vector mathematics these two are areas of same land 70 00:07:02,940 --> 00:07:05,660 ‫if you want to find out the sum of these two arrays. 71 00:07:05,730 --> 00:07:12,960 ‫That is the first element of X added to first element of Y then take an element of X added to second 72 00:07:12,960 --> 00:07:13,770 ‫element of Y. 73 00:07:14,040 --> 00:07:22,320 ‫And third with third and so on till the last element you can simply do this by writing x plus way and 74 00:07:22,320 --> 00:07:24,030 ‫you've run this command. 75 00:07:24,060 --> 00:07:30,450 ‫You get the output with just two four six eight goes up to 20. 76 00:07:30,480 --> 00:07:36,720 ‫This is each element of each variable added to same element in the other variable. 77 00:07:36,720 --> 00:07:47,140 ‫You could have directly assigned this value to a different variable or two so Z get expressway. 78 00:07:47,450 --> 00:07:53,150 ‫So now there's a new variable called Z which has these 10 values. 79 00:07:53,150 --> 00:07:54,820 ‫This was element y's addition. 80 00:07:54,830 --> 00:07:59,450 ‫You can do element ways multiplication also to do that related to get 81 00:08:04,410 --> 00:08:10,430 ‫X multiplied by way multiplication symbol is hysterics. 82 00:08:11,460 --> 00:08:17,680 ‫When you read this you can see that 2 is having the multiplied values of x and y. 83 00:08:18,030 --> 00:08:27,630 ‫So the third element in the 2 is 3 in 2 3 The last element is 10 including one important thing to note 84 00:08:27,840 --> 00:08:30,040 ‫is odd is case sensitive. 85 00:08:30,360 --> 00:08:38,580 ‫When are small X's having value of 2 we can have capital X which can have a separate value. 86 00:08:38,580 --> 00:08:41,550 ‫So both these will be stored as different variables. 87 00:08:41,580 --> 00:08:44,690 ‫Small X and capital X will be two different variables. 88 00:08:44,940 --> 00:08:45,880 ‫This case sensitive. 89 00:08:45,900 --> 00:08:47,700 ‫It is important to remember this. 90 00:08:47,790 --> 00:09:00,720 ‫You can store capital X as capital X Games then run it so you can see there are two variables one is 91 00:09:00,840 --> 00:09:10,310 ‫small legs one is capital X there is one function which will list all the values of your workspace. 92 00:09:10,420 --> 00:09:20,060 ‫So we have smaller X capital X Y Z and the two all these are the values in our workspace. 93 00:09:20,080 --> 00:09:27,880 ‫If you want a list of all these values we'll just write a list open and close the bracket and run it 94 00:09:29,680 --> 00:09:30,510 ‫in the output. 95 00:09:30,520 --> 00:09:32,670 ‫You can see this is the. 96 00:09:32,680 --> 00:09:37,880 ‫These are all the values in the workspace. 97 00:09:38,100 --> 00:09:46,660 ‫Now let us start cleaning up our windows again to clear the console will just press control L or click 98 00:09:46,810 --> 00:09:55,250 ‫on this broom button on the top right corner of control going to next to delete one variable from the 99 00:09:55,250 --> 00:10:04,210 ‫workspace will rate item and within brackets will write x 2. 100 00:10:04,240 --> 00:10:08,350 ‫This will delete the capital X from the workspace. 101 00:10:08,360 --> 00:10:10,790 ‫You can see that is gone. 102 00:10:10,790 --> 00:10:14,510 ‫You can also write the word remove and then write the to 103 00:10:18,630 --> 00:10:20,160 ‫this will remove the two. 104 00:10:20,580 --> 00:10:22,260 ‫Both of these are doing the same thing. 105 00:10:24,630 --> 00:10:32,610 ‫To clear all the variables in the workspace we will write Autumn and in the bracket we will use this 106 00:10:33,050 --> 00:10:33,750 ‫Alice function. 107 00:10:33,750 --> 00:10:34,350 ‫So we'll write. 108 00:10:34,350 --> 00:10:39,380 ‫List is equal to Alice. 109 00:10:39,380 --> 00:10:41,470 ‫Open Closed bracket. 110 00:10:41,680 --> 00:10:42,430 ‫Run this command. 111 00:10:42,680 --> 00:10:45,470 ‫And this will delete all the variables from a workspace.