Mixing
How to add conditions in LATEX macros?
I would like to create custom macros with conditions.
For example, I would like to add an "if-condition" to a macro that I created to write derivatives of any order in relation to a single variable.
Here is the current code of my macro:
newcommand{df}{mathrm{d}}
newcommand{drv}[3]{dfrac{df #2^#1}{df #3^#1}}
The first argument #1 is the order of derivation, the second #2 the function that we take the derivative and the third #3 the variable of derivation.
For example,
drv{n}{f}{x}
will give
I would like to change this code so that it don't display the derivation order #1 if it is equal to 1. But I don't know the syntax, this is why I need your help. I want to write something like
newcommand{drv}[3]{
if #1=1
dfrac{df #2}{df #3}
else
dfrac{df ^#1 #2}{df #3^#1}
}
Thank you for your help, have a good day.
macros conditionals condition
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
asked Jan 1 at 10:07
LoïcLoïc
307
|
show 2 more comments
I would like to create custom macros with conditions.
For example, I would like to add an "if-condition" to a macro that I created to write derivatives of any order in relation to a single variable.
Here is the current code of my macro:
newcommand{df}{mathrm{d}}
newcommand{drv}[3]{dfrac{df #2^#1}{df #3^#1}}
The first argument #1 is the order of derivation, the second #2 the function that we take the derivative and the third #3 the variable of derivation.
For example,
drv{n}{f}{x}
will give
I would like to change this code so that it don't display the derivation order #1 if it is equal to 1. But I don't know the syntax, this is why I need your help. I want to write something like
newcommand{drv}[3]{
if #1=1
dfrac{df #2}{df #3}
else
dfrac{df ^#1 #2}{df #3^#1}
}
Thank you for your help, have a good day.
macros conditionals condition
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
asked Jan 1 at 10:07
LoïcLoïc
307
@ChristianHupfer Thank you. I know but I would like to create my own macros, this is just a simple example to understand the use of conditions.
– Loïc
Jan 1 at 10:13
There already existesdiffanddiffcoeffpackages which already can do that (and more: they consider the case of partial derivatives of any order). Why reinvent the wheel?
– Bernard
Jan 1 at 10:25
@Bernard the OP said this was just a specific example of a more general question about writing macros.
– alephzero
Jan 1 at 10:29
@Bernard I think the question of the OP goes more in the direction of 'How to create macros with conditions?' The derivative is just an example, so using a package will not help him in this case
– caverac
Jan 1 at 10:29
@Bernard thank you for introducing me to these packages. Indeed, I was mainly looking to know how to use "if-conditions", the derivation was only one example.
– Loïc
Jan 1 at 10:32
|
show 2 more comments
I would like to create custom macros with conditions.
For example, I would like to add an "if-condition" to a macro that I created to write derivatives of any order in relation to a single variable.
Here is the current code of my macro:
newcommand{df}{mathrm{d}}
newcommand{drv}[3]{dfrac{df #2^#1}{df #3^#1}}
The first argument #1 is the order of derivation, the second #2 the function that we take the derivative and the third #3 the variable of derivation.
For example,
drv{n}{f}{x}
will give
I would like to change this code so that it don't display the derivation order #1 if it is equal to 1. But I don't know the syntax, this is why I need your help. I want to write something like
newcommand{drv}[3]{
if #1=1
dfrac{df #2}{df #3}
else
dfrac{df ^#1 #2}{df #3^#1}
}
Thank you for your help, have a good day.
macros conditionals condition
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
asked Jan 1 at 10:07
LoïcLoïc
307
I would like to create custom macros with conditions.
For example, I would like to add an "if-condition" to a macro that I created to write derivatives of any order in relation to a single variable.
Here is the current code of my macro:
newcommand{df}{mathrm{d}}
newcommand{drv}[3]{dfrac{df #2^#1}{df #3^#1}}
The first argument #1 is the order of derivation, the second #2 the function that we take the derivative and the third #3 the variable of derivation.
For example,
drv{n}{f}{x}
will give
I would like to change this code so that it don't display the derivation order #1 if it is equal to 1. But I don't know the syntax, this is why I need your help. I want to write something like
newcommand{drv}[3]{
if #1=1
dfrac{df #2}{df #3}
else
dfrac{df ^#1 #2}{df #3^#1}
}
Thank you for your help, have a good day.
macros conditionals condition
macros conditionals condition
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
asked Jan 1 at 10:07
LoïcLoïc
307
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
asked Jan 1 at 10:07
LoïcLoïc
307
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
edited Jan 1 at 10:46
Christian Hupfer
148k14193390
148k14193390
asked Jan 1 at 10:07
LoïcLoïc
307
asked Jan 1 at 10:07
LoïcLoïc
307
asked Jan 1 at 10:07
LoïcLoïc
307
307
@ChristianHupfer Thank you. I know but I would like to create my own macros, this is just a simple example to understand the use of conditions.
– Loïc
Jan 1 at 10:13
There already existesdiffanddiffcoeffpackages which already can do that (and more: they consider the case of partial derivatives of any order). Why reinvent the wheel?
– Bernard
Jan 1 at 10:25
@Bernard the OP said this was just a specific example of a more general question about writing macros.
– alephzero
Jan 1 at 10:29
@Bernard I think the question of the OP goes more in the direction of 'How to create macros with conditions?' The derivative is just an example, so using a package will not help him in this case
– caverac
Jan 1 at 10:29
@Bernard thank you for introducing me to these packages. Indeed, I was mainly looking to know how to use "if-conditions", the derivation was only one example.
– Loïc
Jan 1 at 10:32
|
show 2 more comments
@ChristianHupfer Thank you. I know but I would like to create my own macros, this is just a simple example to understand the use of conditions.
– Loïc
Jan 1 at 10:13
There already existesdiffanddiffcoeffpackages which already can do that (and more: they consider the case of partial derivatives of any order). Why reinvent the wheel?
– Bernard
Jan 1 at 10:25
@Bernard the OP said this was just a specific example of a more general question about writing macros.
– alephzero
Jan 1 at 10:29
@Bernard I think the question of the OP goes more in the direction of 'How to create macros with conditions?' The derivative is just an example, so using a package will not help him in this case
– caverac
Jan 1 at 10:29
@Bernard thank you for introducing me to these packages. Indeed, I was mainly looking to know how to use "if-conditions", the derivation was only one example.
– Loïc
Jan 1 at 10:32
@ChristianHupfer Thank you. I know but I would like to create my own macros, this is just a simple example to understand the use of conditions.
– Loïc
Jan 1 at 10:13
@ChristianHupfer Thank you. I know but I would like to create my own macros, this is just a simple example to understand the use of conditions.
– Loïc
Jan 1 at 10:13
There already exist
esdiff and diffcoeff packages which already can do that (and more: they consider the case of partial derivatives of any order). Why reinvent the wheel?– Bernard
Jan 1 at 10:25
There already exist
esdiff and diffcoeff packages which already can do that (and more: they consider the case of partial derivatives of any order). Why reinvent the wheel?– Bernard
Jan 1 at 10:25
@Bernard the OP said this was just a specific example of a more general question about writing macros.
– alephzero
Jan 1 at 10:29
@Bernard the OP said this was just a specific example of a more general question about writing macros.
– alephzero
Jan 1 at 10:29
@Bernard I think the question of the OP goes more in the direction of 'How to create macros with conditions?' The derivative is just an example, so using a package will not help him in this case
– caverac
Jan 1 at 10:29
@Bernard I think the question of the OP goes more in the direction of 'How to create macros with conditions?' The derivative is just an example, so using a package will not help him in this case
– caverac
Jan 1 at 10:29
@Bernard thank you for introducing me to these packages. Indeed, I was mainly looking to know how to use "if-conditions", the derivation was only one example.
– Loïc
Jan 1 at 10:32
@Bernard thank you for introducing me to these packages. Indeed, I was mainly looking to know how to use "if-conditions", the derivation was only one example.
– Loïc
Jan 1 at 10:32
|
show 2 more comments
1 Answer
1
active
oldest
votes
It's easy with xparse:
documentclass{article}
usepackage{amsmath}
usepackage{xparse}
newcommand{df}{mathop{}!d} % use mathrm{d} if you really prefer it
NewDocumentCommand{drv}{omm}{%
frac{dfIfValueT{#1}{^{#1}kern-scriptspace}#2}
{df#3IfValueT{#1}{^{#1}}}%
}
begin{document}
[
drv{f}{x}=f'(x),qquad
drv[n+1]{f}{x}=drv{}{x}drv[n]{f}{x}
]
end{document}
With o an optional argument is denoted; if it is present, IfValueT{#1} will return true and use the argument as shown.
With the given definition, df will behave as expected also in integrals, leaving a thin space before it when necessary.
answered Jan 1 at 10:37
egregegreg
711k8618913174
1
Thank you, this is perfect. I just do not understand the use ofkern-scriptspace.
– Loïc
Jan 1 at 10:53
@Loïc:scriptspaceis the amount of space inserted after a superscript andkern<length>inserts horizontal space. Thuskern-scriptspaceprecisely cancels the space inserted between e.g.d^{n+1}andf.
– Circumscribe
Jan 1 at 19:34
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It's easy with xparse:
documentclass{article}
usepackage{amsmath}
usepackage{xparse}
newcommand{df}{mathop{}!d} % use mathrm{d} if you really prefer it
NewDocumentCommand{drv}{omm}{%
frac{dfIfValueT{#1}{^{#1}kern-scriptspace}#2}
{df#3IfValueT{#1}{^{#1}}}%
}
begin{document}
[
drv{f}{x}=f'(x),qquad
drv[n+1]{f}{x}=drv{}{x}drv[n]{f}{x}
]
end{document}
With o an optional argument is denoted; if it is present, IfValueT{#1} will return true and use the argument as shown.
With the given definition, df will behave as expected also in integrals, leaving a thin space before it when necessary.
answered Jan 1 at 10:37
egregegreg
711k8618913174
1
Thank you, this is perfect. I just do not understand the use ofkern-scriptspace.
– Loïc
Jan 1 at 10:53
@Loïc:scriptspaceis the amount of space inserted after a superscript andkern<length>inserts horizontal space. Thuskern-scriptspaceprecisely cancels the space inserted between e.g.d^{n+1}andf.
– Circumscribe
Jan 1 at 19:34
add a comment |
It's easy with xparse:
documentclass{article}
usepackage{amsmath}
usepackage{xparse}
newcommand{df}{mathop{}!d} % use mathrm{d} if you really prefer it
NewDocumentCommand{drv}{omm}{%
frac{dfIfValueT{#1}{^{#1}kern-scriptspace}#2}
{df#3IfValueT{#1}{^{#1}}}%
}
begin{document}
[
drv{f}{x}=f'(x),qquad
drv[n+1]{f}{x}=drv{}{x}drv[n]{f}{x}
]
end{document}
With o an optional argument is denoted; if it is present, IfValueT{#1} will return true and use the argument as shown.
With the given definition, df will behave as expected also in integrals, leaving a thin space before it when necessary.
answered Jan 1 at 10:37
egregegreg
711k8618913174
1
Thank you, this is perfect. I just do not understand the use ofkern-scriptspace.
– Loïc
Jan 1 at 10:53
@Loïc:scriptspaceis the amount of space inserted after a superscript andkern<length>inserts horizontal space. Thuskern-scriptspaceprecisely cancels the space inserted between e.g.d^{n+1}andf.
– Circumscribe
Jan 1 at 19:34
add a comment |
It's easy with xparse:
documentclass{article}
usepackage{amsmath}
usepackage{xparse}
newcommand{df}{mathop{}!d} % use mathrm{d} if you really prefer it
NewDocumentCommand{drv}{omm}{%
frac{dfIfValueT{#1}{^{#1}kern-scriptspace}#2}
{df#3IfValueT{#1}{^{#1}}}%
}
begin{document}
[
drv{f}{x}=f'(x),qquad
drv[n+1]{f}{x}=drv{}{x}drv[n]{f}{x}
]
end{document}
With o an optional argument is denoted; if it is present, IfValueT{#1} will return true and use the argument as shown.
With the given definition, df will behave as expected also in integrals, leaving a thin space before it when necessary.
answered Jan 1 at 10:37
egregegreg
711k8618913174
It's easy with xparse:
documentclass{article}
usepackage{amsmath}
usepackage{xparse}
newcommand{df}{mathop{}!d} % use mathrm{d} if you really prefer it
NewDocumentCommand{drv}{omm}{%
frac{dfIfValueT{#1}{^{#1}kern-scriptspace}#2}
{df#3IfValueT{#1}{^{#1}}}%
}
begin{document}
[
drv{f}{x}=f'(x),qquad
drv[n+1]{f}{x}=drv{}{x}drv[n]{f}{x}
]
end{document}
With o an optional argument is denoted; if it is present, IfValueT{#1} will return true and use the argument as shown.
With the given definition, df will behave as expected also in integrals, leaving a thin space before it when necessary.
answered Jan 1 at 10:37
egregegreg
711k8618913174
answered Jan 1 at 10:37
egregegreg
711k8618913174
answered Jan 1 at 10:37
egregegreg
711k8618913174
answered Jan 1 at 10:37
egregegreg
711k8618913174
711k8618913174
1
Thank you, this is perfect. I just do not understand the use ofkern-scriptspace.
– Loïc
Jan 1 at 10:53
@Loïc:scriptspaceis the amount of space inserted after a superscript andkern<length>inserts horizontal space. Thuskern-scriptspaceprecisely cancels the space inserted between e.g.d^{n+1}andf.
– Circumscribe
Jan 1 at 19:34
add a comment |
1
Thank you, this is perfect. I just do not understand the use ofkern-scriptspace.
– Loïc
Jan 1 at 10:53
@Loïc:scriptspaceis the amount of space inserted after a superscript andkern<length>inserts horizontal space. Thuskern-scriptspaceprecisely cancels the space inserted between e.g.d^{n+1}andf.
– Circumscribe
Jan 1 at 19:34
1
1
Thank you, this is perfect. I just do not understand the use of
kern-scriptspace.– Loïc
Jan 1 at 10:53
Thank you, this is perfect. I just do not understand the use of
kern-scriptspace.– Loïc
Jan 1 at 10:53
@Loïc:
scriptspace is the amount of space inserted after a superscript and kern<length> inserts horizontal space. Thus kern-scriptspace precisely cancels the space inserted between e.g. d^{n+1} and f.– Circumscribe
Jan 1 at 19:34
@Loïc:
scriptspace is the amount of space inserted after a superscript and kern<length> inserts horizontal space. Thus kern-scriptspace precisely cancels the space inserted between e.g. d^{n+1} and f.– Circumscribe
Jan 1 at 19:34
add a comment |
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@ChristianHupfer Thank you. I know but I would like to create my own macros, this is just a simple example to understand the use of conditions.
– Loïc
Jan 1 at 10:13
There already exist
esdiffanddiffcoeffpackages which already can do that (and more: they consider the case of partial derivatives of any order). Why reinvent the wheel?– Bernard
Jan 1 at 10:25
@Bernard the OP said this was just a specific example of a more general question about writing macros.
– alephzero
Jan 1 at 10:29
@Bernard I think the question of the OP goes more in the direction of 'How to create macros with conditions?' The derivative is just an example, so using a package will not help him in this case
– caverac
Jan 1 at 10:29
@Bernard thank you for introducing me to these packages. Indeed, I was mainly looking to know how to use "if-conditions", the derivation was only one example.
– Loïc
Jan 1 at 10:32