PoojaMoolya: Created page with "{| border = 1 |- || '''Time''' || '''Narration''' |- || 00:01 || Welcome to this tutorial on numbering equations using '''LaTeX'''. My name is Kannan Moudgalya. |- || 00:09..."

2022-09-06T07:02:58Z

Created page with "{| border = 1 |- || '''Time''' || '''Narration''' |- || 00:01 || Welcome to this tutorial on numbering equations using '''LaTeX'''. My name is Kannan Moudgalya. |- || 00:09..."

New page

{| border = 1
|-
|| '''Time'''
|| '''Narration'''
|-
|| 00:01
|| Welcome to this tutorial on numbering equations using '''LaTeX'''.

My name is Kannan Moudgalya.

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|| 00:09
|| In this tutorial, we will learn-

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|| 00:12
||How to put equation numbers

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|| 00:15
||How to remove them

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|| 00:17
||How to correctly reference equations

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|| 00:21
||How to use the information on the '''web'''

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|| 00:25
|| One may use any of '''Linux, Windows''' or a '''Mac''' operating system.

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|| 00:31
||One needs '''LaTeX'''.

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|| 00:34
||I shall use '''TeXworks'''.

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|| 00:37
|| What are the prerequisites?

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|| 00:39
||One needs to be familiar with spoken tutorials that introduce '''LaTeX'''.

|-
|| 00:45
||We recommend the use of the '''Side-by-Side method'''.

|-
|| 00:49
||This information is available at the '''Spoken Tutorial webpage'''.

|-
|| 00:55
|| I shall use the following files:

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|| 00:58
||'''numbers.tex''', which you can see here.

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|| 01:03
||'''ltxprimer pdf''' file from '''TUG India'''. It is here.

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|| 01:09
||These are available as Code files along with this tutorial.

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|| 01:14
||With these files, you will be able to practise along with me.

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|| 01:19
||If you don't have these files, please download them from the '''Spoken Tutorial website'''.

|-
|| 01:26
|| Let us begin the tutorial.

|-
|| 01:28
|| Let us learn how to create numbers for equations in '''LaTeX'''.

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|| 01:33
||I have already opened the file '''numbers.tex''' in '''TeXworks'''.
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|| 01:39
||I have saved it as '''align.tex''' to use in this tutorial.
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||01:44
||I will keep the '''numbers.tex''' file intact, and not change it.
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||01:49
||Please pause the tutorial, make a copy of '''numbers.tex''' and open it.

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|| 01:55
||Whenever you want to start afresh, you can make a new copy of '''numbers.tex'''

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|| 02:01
||I recommend this method whenever a code file is given with ANY '''spoken tutorial'''.
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||02:08
||Let me open '''align.tex'''

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|| 02:11
|| Let us '''compile''' this file by pressing the '''Typeset''' arrow at the top left hand corner.

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|| 02:18
||You can see the '''pdf''' file on the right.

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|| 02:22
|| These equations do not have numbers.

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||02:26
||We can put equation numbers by removing the '''star''' from the '''align star'''.

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||02:32
||Let us remove the '''star''' from both '''begin''' and '''end statements'''.

|-
|| 02:39
||Forgetting it in the '''end statement''' is a common mistake.

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||02:43
||Let’s see what happens if I forget to remove it from the '''end align statement'''.

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||02:49
||Let us '''compile'''.

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||02:51
||It gives an error message '''begin align ended with align star'''.

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||02:57
||Let us remove the '''star''' from '''end align''' also.

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|| 03:02
||Let us abort '''typesetting''' and '''compile'''.

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|| 03:07
||We now have equation numbers.

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|| 03:11
|| Let us now refer to the second equation in the running text.

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|| 03:16
||Put the number 2 after the word equation.

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||03:21
||'''Compile'''.

We see number 2 in the running text.
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|| 03:27
|| I will now show you how to remove the equation number of one equation.
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||03:32
||Suppose that we don’t want a number for the first equation.
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||03:37
||Go to the end of the first equation, but before '''intertext''', and put '''back slash nonumber'''.
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||03:46
||Please note that '''nonumber''' is one word.

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|| 03:50
||Do not forget the '''back slash''' at the beginning.
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||03:54
||On '''compiling''', the number disappears from the first equation.
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||04:00
||One consequence is that the second equation is now numbered as one.
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|| 04:07
|| Unfortunately, the reference to the second equation has become wrong in the text.
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||04:13
||Can we prevent such mistakes even if we have to add or remove equations?

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|| 04:19
||Such a requirement occurs frequently while writing reports, theses, papers, etc.
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||04:27
||It is possible to do this through the '''label statement'''.

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|| 04:32
||We have seen this in a previous tutorial also.

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|| 04:36
||Let me put '''slash label PID''' at the end of the second equation, but before '''end align'''.

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|| 04:47
|| Replace '''2''' in the running text with '''slash ref PID''' as I do now.

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||04:56
||After '''compiling''' once, two question marks appear against the equation number.
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||05:02
||On '''compiling''' twice, the question marks get replaced by the correct number.
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|| 05:09
|| Let us change the equation number once again by removing '''nonumber'''.
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||05:15
||'''Compile''' twice to get correct answers.
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|| 05:20
|| The '''variable''' in the '''ref''' and '''label commands''' have to be identical.

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||05:26
||Check what happens if you change '''PID''' in the '''ref command''' to lowercase.

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|| 05:34
||Leave the '''PID''' in uppercase in the '''label command''' and '''compile'''.
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||05:40
||We get question mark here because this lowercase '''pid''' is not defined.

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|| 05:48
||I will put pid back in uppercase and '''compile'''.
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|| 05:55
|| I will now show you how to take help from the '''Internet'''.
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||06:00
||Before that, I am going to delete everything in the '''tex''' file.

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|| 06:05
||If you don’t like it, you can open a new file.
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|| 06:09
|| To do this part, you need access to '''Internet'''.

If you don’t have this access now, you may try this part later.
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||06:17
||Let me go to a '''web browser'''.

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|| 06:20
||Let me do a web search on the topic of '''LaTeX multiline'''.
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||06:27
||The very first hit is on '''stackexchange'''.

|-
|| 06:32
||Let me click this '''“How to align...”'''.
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||06:36
||If you scroll down this page, you will see a question and several answers.

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|| 06:43
||Most answers present a complete '''code'''.

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|| 06:48
|| Let us copy the '''code''' that says '''58'''.

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|| 06:53
||This number may be different when you access this page.

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|| 06:58
||Below this, the '''pdf''' file created by this '''code''' is shown.

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|| 07:04
||Let me paste it on the '''tex''' file.
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|| 07:08
|| Let us '''compile''' the '''tex''' file.

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|| 07:11
||You can check the output in this '''pdf''' file to be identical to what we saw in '''stackexchange'''.
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|| 07:19
|| Please try all '''commands''' explained in this '''web page''' and understand them.
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|| 07:24
|| Next let me delete everything inside the '''document environment'''.

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|| 07:31
||Let us now open the '''ltxprimer pdf''' file that we have provided with this tutorial.

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|| 07:38
||You can practise this part even if you don’t have '''web access'''.
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|| 07:43
|| Let us scroll and go to '''Contents'''.
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||07:48
||Let us click '''“Typesetting Mathematics”'''.
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||07:52
||You can see many examples.
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||07:55
||Let us go to page 87.
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||07:59
||Let us copy '''“cases code”''' and paste it within the '''document environment'''.
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||08:08
||On '''compiling''' it, we get the output given in '''ltxprimer'''.
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|| 08:14
|| You may change '''equation*''' to '''align*''', and '''compile'''.

|-
|| 08:20
||We get identical results.

|-
|| 08:23
||I suggest that you spend a minute in understanding this example.

|-
|| 08:28
||I also suggest that you try more examples from '''ltxprimer'''.
|-
|| 08:33
|| This brings us to the end of this tutorial.
|-
|| 08:37
|| This page summarises what we learnt in this tutorial.

|-
|| 08:42
||Please recall each of these '''commands'''.

This is your first assignment.

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|| 08:48
||Please do a search on these commands over the '''web''', in '''ltxprimer''', etc.

Locate these examples and try them out.
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|| 08:59
|| I will give some more assignments.
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|| 09:03
|| We '''compiled''' twice to get correct numbers.

Why should we '''compile''' twice?

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|| 09:09
||Hint: we saw this in an earlier tutorial.

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|| 09:13
||You can also locate an answer for this in '''ltxprimer.pdf''' file.

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|| 09:19
||Search for '''Cross References'''.
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|| 09:22
|| Try examples from '''Chapter 8''' of '''ltxprimer pdf''' file we saw earlier.

Try to understand them.
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|| 09:30
|| Try '''multiline''' examples from the '''Stackexchange web page''' we saw earlier.
|-
|| 09:36
|| I will now give some general information.

|-
|| 09:40
||This video summarises the '''Spoken Tutorial''' project.
|-
|| 09:45
|| We conduct workshops using '''Spoken Tutorials'''.
|-
|| 09:50
|| Do you have questions in THIS '''Spoken Tutorial?'''

|-
|| 09:54
|| Please visit this site

|-
|| 09:56
|| Choose the minute and second where you have the question

|-
|| 10:00
|| Explain your question briefly

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|| 10:03
|| Someone from our team will answer them

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|| 10:06
||You will have to register on this '''website''' to ask questions.
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||10:11
|| For topics not covered in spoken tutorials, visit '''stackexchange''' at this address.

|-
|| 10:17
||This is a great place to get answers on '''LaTeX'''.
|-
|| 10:22
|| You may also have questions on our workshops, certificates, etc.

For this, get in touch with us at this email address.
|-
|| 10:32
|| '''Spoken Tutorial''' project is funded by MHRD, Government of India.
|-
|| 10:37
|| Thanks for joining.

Goodbye.
|-
|}

LaTeX/C2/Numbering-Equations/English-timed - Revision history

PoojaMoolya: Created page with "{| border = 1 |- || '''Time''' || '''Narration''' |- || 00:01 || Welcome to this tutorial on numbering equations using '''LaTeX'''. My name is Kannan Moudgalya. |- || 00:09..."