Difference between revisions of "LaTeX/C3/Feedback-diagram-with-Maths/English-timed"

!Time

!Narration

|0:00

|Welcome to the spoken tutorial on embedding mathematics in Xfig

|0:05  

|In this tutorial, I shall explain how to Create this Figure

|0:11

|Observe the mathematical expression in the second block  

|0:16

|You can embed any mathematical expression after learning this tutorial  

|0:23

|We shall create the figure in the previous slide, starting from this figure which was created in the spoken tutorial on “Feedback Diagrams through Xfig”  

|0:36

|You should learn this tutorial before starting the current one  

|0:42

|Let me now explain what all you need to learn the material taught in this tutorial

 

|0:48

|I am using Xfig, Version 3.2, patch level 5  

|0:52

|You also need LaTeX, and a familiarity with it  

|0:56

|You also need image cropping software  

|1:01

|pdfcrop works on Linux and Mac OS X .We will cover it in this tutorial  

|1:09

|Briss is said to work on Windows also, but not covered in this tutorial  

|1:15

|Let us go to Xfig

|1:19

|Let us choose file, then open.  

|1:26

|If we scroll through the list, we will see the file “feedback.fig”, created in the spoken tutorial on “Feedback Diagrams through Xfig” .Let us click it  

|1:42

|We will see the figure inside this box  

|1:45

|1:53

|2:01

|2:05

|Using the “save as” option on “file”, we will save this figure as maths.  

|2:20

|Let us save it.  

|2:24

|We now have the file maths.fig  

|2:27

|Let us select “Edit” and click the text “Plant”  

|2:34

|Let me take the mouse here. Let me delete this and enter  

$G(z) = \frac z{z-1}$  

|2:50

|Make sure that the mouse stays within the box while typing  

|2:56

|The default value for “Flag” is “normal” - change it to “special”

|3:01

|Click “done”

|3:07

|As the text is long, it overlaps with other entries  

|3:12

|3:23

|3:26

|Let me choose grid mode.  

|3:31

|3:39

|Let us save the file.  

|3:44

|Let us export using combined pdf and latex files.  

|3:51

|File. Export. Combined pdf and LaTeX. .Let us export.  

|4:03

|There is an error message I get. But let us not worry about this.  

|4:11

|Let me go to the terminal.  

|4:13

|Let me type “ls -lrt”

|4:21

|We get a list of files, with the last one being the most recent  

|4:26

|The last two files are maths.pdf_t and maths.pdf  

|4:33

|Let us give the command “open maths.pdf”

|4:42

|4:45

|We can see the block diagram without the mathematical expression  

|4:50

|Let me close this  

|4:52

|Let us see maths.pdf_t in emacs editor that I have already opened  

|5:01

|5:14

|Please note that you do NOT have to use emacs  

|5:17

|You can use WHATEVER editor that you are comfortable with  

|5:22

|You can see  that the “picture” environment is used  

|5:26

|It also makes use of “includegraphics” and “color” packages – we need to tell LaTeX to take care of this requirement  

|5:41

|Let me now open the file maths-bp.tex,I have already created for this tutorial  

|5:59

|I have used article class  

|6:02

|I have used color and graphicx packages as these are used in the file pdf_t, the one we saw earlier.  

|6:15

|I want empty pagestyle, as I do not want the page number  

|6:20

|Finally, I want to include the file maths.pdf_t  

|6: 27

|Let us invoke the command “pdflatex maths-bp” in the terminal  

|6:42

|We get the message that the maths-bp.pdf is created.  

|6:48

|Let us open it with the command “open maths-bp.pdf”

|6:58

|7:07

|Now that we know that the mathematical expression is working, let us move the text inside the block  

|7:30

|Let us save and export. It is already in the required language. Export.  

|7:38

|7:41

|7:44

|Let us click the pdf browser that has the file  

|7: 49

|Now you see the mathematical expression inside the box, the way we want  

|7:56

|Let us now see what happens if we do not choose the special flag.  

|8:01

|8:04

|Let me edit the text, change the “Special Flag” to “normal”. Done.  

|8:25

|File, save. Let me export  

|8:37

|8:41

|The formula is no longer in the form we want  

|8:46

|Let us change the “special flag” back to “special”

|9:03

|Save, export

|9:12

|Recompile. See that the file is in the form we want.

|9:18

|Let us now improve the appearance of this formula

|9:22

|In this case, the use of dfrac will make the fraction look better.  

|9:28

|In view of this, let us change frac to dfrac.  

|9:38

|Let me click here. Keep the mouse inside the box.  

|9:43  

|Put d here. Done. Save, export.  

|9:52

|Let us compile once again using “pdflatex”

|We get the error message “Undefined control sequence” \dfrac  

|LaTeX complains because the command \dfrac is defined in the package “Amsmath” but we have not included it.  

|We need to include it in the file maths-bp.tex.  

|Enter “\usepackage{amsmath}”  

|Let us save the file. Let us compile once again. Let me first exit.  

|Let me now recompile. Now it compiles.Let us click this.  

|We have now achieved our objective of learning how to embed mathematical expressions in Xfig  

|The interpretation is done by the “pdflatex” command  

|Let me type the command “pdfcrop maths-bp.pdf” - this is the file we created, into “maths-out.pdf”.  

|Pdfcrop says one page written on this file.  

| “pdfcrop” takes an input file, trims the space around the figure and writes out the cropped file in the output file.  

| “pdfcrop” is already installed in my system.  

|Let us view this output file by the command, “open maths-out.pdf”.  

|Let me come back to the slides.  

|It is supposed to work on Linux, Mac OS X and also on Windows.  

|I have checked its working on Mac OS X. But we will not demonstrate it here.  

|We have now come to the end of this tutorial

|We have an assignment for you .Make the diagram created in this tutorial more symmetric and beautiful  

|Try out different mathematical expressions  

|Try out other options, such as flip and rotate, not covered in the spoken tutorial  

|Try to build different diagrams .Explore the library  

|Do an internet search and locate information relevant to Xfig  

|Useful learning material is available at spoken-tutorial.org. It is here.  

|The concept of spoken tutorials is explained in "What is a Spoken Tutorial"  

|You may learn LaTeX using the spoken tutorials available here, which I have downloaded in this tab.  

|The tutorial on Mathematical Typesetting explains how to create maths in LaTeX  

|The tutorial on Tables and Figures explains how to place figures, of the type created in this tutorial, into documents  

|This website has a lot of useful information, including, Xfig tutorials. Come back to the slides.  

|Spoken Tutorial is a part of the Talk to a Teacher project, supported by the National Mission on Education through ICT (NMEICT), MHRD, Government of India.  

|More information on this mission is available at spoken-tutorial.org/NMEICT-Intro  

|This is Kannan Moudgalya signing off. Thanks for joining. Goodbye