Grace/C2/Bar-Chart-and-Error-Bars/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 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) [2] [3]. |
| 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. |
| 12:02 | This video summarizes the Spoken Tutorial Project.
Please download and watch it. |
| 12:10 | The Spoken Tutorial Project team: conducts workshops and gives certificates.
For more details, please write to us. |
| 12:21 | Please post your timed queries in this forum. |
| 12:26 | Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
More information on this mission is available at this link. |
| 12:37 | This tutorial is contributed by Rani from IIT, Bombay.
Thank you for joining. |
