|00:01||Welcome to the spoken tutorial on Bar Chart and Error bars.|
|00:07|| In this tutorial, we will learn to,
Draw a bar chart
|00:13||Label the x-axis with string data|
|00:18||Edit the dataset|
|00:21||Add error bars in y-axis|
|00:25||Change the error bar size and color|
|00:30||Add an object and format the style and|
|00:36||Delete an object|
|00:38||To record this tutorial, I am using,|
|00:42||Ubuntu Linux 16.04 OS|
|00:48||Grace version 5.1.25|
|00:53||gedit text editor 3.18.3|
|00:59||To follow this tutorial, Learner must be familiar with the Grace interface.|
|01:06||For the pre-requisite tutorials, please visit this site.|
|01:11||The example files required for this tutorial are provided in the code files link.|
|01:18||Please download and extract the files to Desktop.|
|01:23||Go to Desktop.|
|01:26||Notice the text file bar.txt.|
|01:30||Open file bar.txt in a text editor and notice the three data columns.|
|01:39||The first column is the data row number.|
|01:43||Second column is y data.|
|01:47||The third column is the x data which is a string.|
|01:52||Close the text editor window.|
|01:55||I have opened the Grace program.|
|01:58||First, resize the graph panel to fit the field of view.|
|02:03||Go to Data, import, ASCII to open the Grace read sets dialog box.|
|02:13||Navigate to Desktop and select the bar.txt file.|
|02:23||For set type choose bar option from the dropdown.|
|02:28||Autoscale XY on read and click on Ok to load the data.|
|02:35||Click on Cancel to close the dialog box.|
|02:40||A bar chart appears along with a line plot.|
|02:45||Let’s format the properties of the bar chart and add the x string data to it.|
|02:52||Double click on the line to open Set Appearance window.|
|02:58||I will drag the Set Appearance window for better view.|
|03:03||Under the Line properties, in the Type dropdown, choose None.|
|03:09||Click on Apply to remove the line in the graph.|
|03:13||Click on Close, to close the dialog box.|
|03:17||Next, go to the Plot menu and select Axis properties.|
|03:23|| In the Grace: Axes window, change the x axis limits from zero to four.
Type start at 0 and at stop 4.
|03:35||Under Tick properties, I will set Major spacing to one and Minor ticks to zero.|
|03:42||Click on Apply, to apply the changes.|
|03:46||In the Edit dropdown, select y axis.|
|03:50|| I will change the y axis limits to start from zero and to stop at 5.
Click on Apply.
|03:59||From the tick marks tab, from the Draw on drop down, choose Normal side.|
|04:06||Then click Apply to apply the changes.|
|04:10||Let us change the same for x axis.|
|04:14||In the Edit dropdown, select X axis.|
|04:18||In the Draw on dropdown, change draw ticks to Normal side.|
|04:24||Again click on Apply to apply the changes to the graph.|
|04:29||Notice how the graph looks after each change has been applied.|
|04:35||Click on the Special tab on the right side.|
|04:39||This tab is labeled as custom ticks in Qtgrace.|
|04:44||In the Special ticks drop down, choose Tick marks and labels.|
|04:50||Let us re-open bar.txt file.|
|04:54||Notice that, the string S1 is associated with the first data point.|
|05:01||Similarly the string S2 is associated with the second data point.|
|05:07||And the string S3 is associated with the third data point.|
|05:12||Close the text editor window.|
|05:15||Make sure the Edit form is in x-axis.|
|05:20||In the tick location label form, enter data as seen.|
|05:26||Delete the value zero and four on the second column.|
|05:31||Type, S1, S2 and S3 against 1, 2 and 3 in the second column.|
|05:39||Click on Apply to see the changes in the graph.|
|05:43||Next, let’s learn to edit a dataset within the Grace program.|
|05:49||Click on Close to close the dialog box.|
|05:53||Double click on the bar in the graph to open the Set Appearance window.|
|06:00||Under Select set, notice G(0) (S0)  .|
|06:07||G denotes graph and S refers to the dataset in the graph.|
|06:13||Here it is graph zero and set zero.|
|06:18||Right-click and hold the mouse on G(0) S0 to open a context menu.|
|06:26||The context menu has more options in Qtgrace.|
|06:32||In the menu choose Edit and from the sub-menu, select In Spreadsheet option.|
|06:41||The dataset opens in the Spreadsheet data set editor.|
|06:46||In the Type drop-down change BAR to BARDY and click on Apply.|
|06:54||An extra column Y1 gets added to the spreadsheet.|
|06:59||Windows users will not see the string label column in Qtgrace.|
|07:06|| I will enter the error values as 0.4, 0.6 and 0.3 in the Y1 column and
click on Apply.
|07:18||Click on Close, on the Spreadsheet editor window.|
|07:22||Notice the incorporated error bars on the bar chart.|
|07:27||Next, we will edit the size of the Error bar.|
|07:32||Go to the Set appearance window and choose the Error bar tab.|
|07:38||Change the Bar line to 50 using the scroll bar.|
|07:43|| Click on the color drop down and select red color.
Then, click on Apply.
|07:51||This changes the color of the error bars to red.|
|07:56||Click on Close in the set appearance window.|
|08:00||We will now draw an arrow in the plot.|
|08:05|| Go to Window in menu and choose Drawing Objects.
The Objects panel opens.
|08:13||Click on the Line button and move the cursor to the plot.|
|08:18||The cursor changes to plus sign.|
|08:22||I will left click on the desired location to start the line.|
|08:27||Drag the cursor to draw the line until the desired location.|
|08:32||Notice that a line is drawn.|
|08:35||Click left again to fix the end location of the line.|
|08:40||Click on the Edit object.|
|08:44||Next, Double click on the line.|
|08:47||The Edit Line dialog box opens.|
|08:51||Change Line width to 1.5 using the triangle buttons.|
|08:57||For the arrow styles, in the Place at drop-down, choose End.|
|09:03||For the arrow Type, choose Filled.|
|09:07||Decrease I by L form factor to 0.7 .|
|09:12|| The Position shows Viewport coordinates.
I will leave it as is.
|09:19||Click on Accept to change the arrow style.|
|09:23||Click on Close to close the dialog box.|
|09:27||We can make a copy of an existing object.|
|09:31||To make a similar arrow as this, click on Copy object in the Objects panel.|
|09:39||The cursor changes to a hand sign.|
|09:43||Left click and hold on the arrow to see a box.|
|09:48||Drag the box and place the copied arrow at the desired location.|
|09:54||Left click to release the copied arrow in the desired location.|
|10:00||We can also delete the objects added to the graph.|
|10:04||To delete an added object, click on Delete object in the Objects panel.|
|10:10||Move cursor to the graph and the cursor changes to a x sign.|
|10:17||I will click on the newly copied arrow to delete it.|
|10:22||A warning popup window opens, asking the user Kill the line?|
|10:28||Click on Ok and notice that the object has been deleted.|
|10:33||Similarly, we can add text, ellipse and also format their properties.|
|10:40||Click on Close to close the objects panel.|
|10:45||Let us save the Grace project before closing it.|
|10:48||I will save with file as barxydy.agr on Desktop.|
|10:56||Choose File, Exit to exit Grace.|
|11:01||Now let's summarize.|
|11:03|| In this tutorial, we,
Drew a bar chart
|11:08||Labeled the x-axis with string data|
|11:13||Edited the dataset|
|11:16|| Added error bars in the y-axis
Adjusted the error bar size
|11:24||Added an object, formatted the style and deleted an object|
|11:30||For assignment, please do the following.|
|11:34||Draw a Time-activity graph for your daily activities.|
|11:42||For this, time your activities in a day and make a time table.|
|11:47||Plot a bar chart with time in hours on y-axis and activities on x-axis.|
|11:56||Your completed assignment may look similar to this.|
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|12:37|| This tutorial is contributed by Rani from IIT, Bombay.
Thank you for joining.