Different dimensions with shift and xshift

I discovered that there is a different default dimension in shift and xshift.

Consider the following mwe

documentclass{article}

usepackage{tikz}

begin{document}

begin{tikzpicture}

  node (a) at (0,3) {a};

  node (b) at (0,2) {b};

  node (c) at (0,1) {c};

  node (d) at (0,0) {d};

  node[xshift=5cm] at (a) {aa};

  node[shift={(5cm,0)}] at (b) {bb};

  node[xshift=5] at (c) {cc};

  node[shift={(5,0)}] at (d) {dd};

  draw[help lines] (0,0) grid (5,3) ;

end{tikzpicture}

end{document}

It gives the following result:
enter image description here

For the two first lines given with 'cm' (a and b), the behavior of shift and xshift is the same.

But without dimensions (c and d) , it seems that shift uses default tikz dimensions, while xshift seems to use point?

I noticed that in the manual xshift is always given with cm, but this behavior is not explained.

Am I doing something incorrect? Is it a bug or a feature?

asked 2 hours ago

Alain Merigot

612

1

You're not doing anything incorrect, and this has been noticed before. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs. As you have noticed, this is also true for coordinates, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly. But for "most" other situations the default unit is pt.

– marmot
2 hours ago

I can understand that commands doing completely different actions have different default dimensions. But shift and xshift seem very close, at least in terms of functionality. And this difference in behavior is really confusing...

– Alain Merigot
2 hours ago

I agree it is confusing. But in my list of confusing things this is below the confusion which library one has to load to make an example from the pgfmanual run through. (And I would like to draw your attention to this source of confusion, which confuses me, too. ;-)

– marmot
2 hours ago

add a comment |

I discovered that there is a different default dimension in shift and xshift.

Consider the following mwe

documentclass{article}

usepackage{tikz}

begin{document}

begin{tikzpicture}

  node (a) at (0,3) {a};

  node (b) at (0,2) {b};

  node (c) at (0,1) {c};

  node (d) at (0,0) {d};

  node[xshift=5cm] at (a) {aa};

  node[shift={(5cm,0)}] at (b) {bb};

  node[xshift=5] at (c) {cc};

  node[shift={(5,0)}] at (d) {dd};

  draw[help lines] (0,0) grid (5,3) ;

end{tikzpicture}

end{document}

It gives the following result:
enter image description here

For the two first lines given with 'cm' (a and b), the behavior of shift and xshift is the same.

But without dimensions (c and d) , it seems that shift uses default tikz dimensions, while xshift seems to use point?

I noticed that in the manual xshift is always given with cm, but this behavior is not explained.

Am I doing something incorrect? Is it a bug or a feature?

asked 2 hours ago

Alain Merigot

612

1

You're not doing anything incorrect, and this has been noticed before. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs. As you have noticed, this is also true for coordinates, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly. But for "most" other situations the default unit is pt.

– marmot
2 hours ago

I can understand that commands doing completely different actions have different default dimensions. But shift and xshift seem very close, at least in terms of functionality. And this difference in behavior is really confusing...

– Alain Merigot
2 hours ago

I agree it is confusing. But in my list of confusing things this is below the confusion which library one has to load to make an example from the pgfmanual run through. (And I would like to draw your attention to this source of confusion, which confuses me, too. ;-)

– marmot
2 hours ago

add a comment |

I discovered that there is a different default dimension in shift and xshift.

Consider the following mwe

documentclass{article}

usepackage{tikz}

begin{document}

begin{tikzpicture}

  node (a) at (0,3) {a};

  node (b) at (0,2) {b};

  node (c) at (0,1) {c};

  node (d) at (0,0) {d};

  node[xshift=5cm] at (a) {aa};

  node[shift={(5cm,0)}] at (b) {bb};

  node[xshift=5] at (c) {cc};

  node[shift={(5,0)}] at (d) {dd};

  draw[help lines] (0,0) grid (5,3) ;

end{tikzpicture}

end{document}

It gives the following result:
enter image description here

For the two first lines given with 'cm' (a and b), the behavior of shift and xshift is the same.

But without dimensions (c and d) , it seems that shift uses default tikz dimensions, while xshift seems to use point?

I noticed that in the manual xshift is always given with cm, but this behavior is not explained.

Am I doing something incorrect? Is it a bug or a feature?

asked 2 hours ago

Alain Merigot

612

I discovered that there is a different default dimension in shift and xshift.

Consider the following mwe

documentclass{article}

usepackage{tikz}

begin{document}

begin{tikzpicture}

  node (a) at (0,3) {a};

  node (b) at (0,2) {b};

  node (c) at (0,1) {c};

  node (d) at (0,0) {d};

  node[xshift=5cm] at (a) {aa};

  node[shift={(5cm,0)}] at (b) {bb};

  node[xshift=5] at (c) {cc};

  node[shift={(5,0)}] at (d) {dd};

  draw[help lines] (0,0) grid (5,3) ;

end{tikzpicture}

end{document}

It gives the following result:
enter image description here

For the two first lines given with 'cm' (a and b), the behavior of shift and xshift is the same.

But without dimensions (c and d) , it seems that shift uses default tikz dimensions, while xshift seems to use point?

I noticed that in the manual xshift is always given with cm, but this behavior is not explained.

Am I doing something incorrect? Is it a bug or a feature?

tikz-pgf

asked 2 hours ago

Alain Merigot

612

asked 2 hours ago

Alain Merigot

612

asked 2 hours ago

Alain Merigot

612

asked 2 hours ago

Alain Merigot

612

asked 2 hours ago

Alain Merigot

612

1

You're not doing anything incorrect, and this has been noticed before. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs. As you have noticed, this is also true for coordinates, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly. But for "most" other situations the default unit is pt.

– marmot
2 hours ago

I can understand that commands doing completely different actions have different default dimensions. But shift and xshift seem very close, at least in terms of functionality. And this difference in behavior is really confusing...

– Alain Merigot
2 hours ago

I agree it is confusing. But in my list of confusing things this is below the confusion which library one has to load to make an example from the pgfmanual run through. (And I would like to draw your attention to this source of confusion, which confuses me, too. ;-)

– marmot
2 hours ago

add a comment |

1

You're not doing anything incorrect, and this has been noticed before. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs. As you have noticed, this is also true for coordinates, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly. But for "most" other situations the default unit is pt.

– marmot
2 hours ago

I can understand that commands doing completely different actions have different default dimensions. But shift and xshift seem very close, at least in terms of functionality. And this difference in behavior is really confusing...

– Alain Merigot
2 hours ago

I agree it is confusing. But in my list of confusing things this is below the confusion which library one has to load to make an example from the pgfmanual run through. (And I would like to draw your attention to this source of confusion, which confuses me, too. ;-)

– marmot
2 hours ago

You're not doing anything incorrect, and this has been noticed before. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs. As you have noticed, this is also true for coordinates, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly. But for "most" other situations the default unit is pt.

– marmot
2 hours ago

I can understand that commands doing completely different actions have different default dimensions. But shift and xshift seem very close, at least in terms of functionality. And this difference in behavior is really confusing...

– Alain Merigot
2 hours ago

I agree it is confusing. But in my list of confusing things this is below the confusion which library one has to load to make an example from the pgfmanual run through. (And I would like to draw your attention to this source of confusion, which confuses me, too. ;-)

– marmot
2 hours ago

add a comment |

2 Answers
2

active

oldest

votes

Some thoughts:

You're not doing anything incorrect.

Is it a bug? It is not a bug in the sense that the program crashes or that the result deviates from what one may expect from the manual. So my take it is not a bug.

The default unit for coordinates is cm, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly.

Is this not the only situation where cm is the unit. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs.

But for "most" other situations the default unit is pt.

answered 1 hour ago

marmot

90.9k4104196

add a comment |

In TikZ always the default unit for length values is pt. And we have

/tikz/xshift=<dimension>

So the default unit for xshift is pt.

In (1,0) you can think of cm as default unit but there is no default unit. Simply (1,0) is 1.x+0.y so it depends on the value of the x vector, which is initially set to (1cm,0).

edited 31 mins ago

answered 41 mins ago

Kpym

15.8k23986

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

Some thoughts:

You're not doing anything incorrect.

Is it a bug? It is not a bug in the sense that the program crashes or that the result deviates from what one may expect from the manual. So my take it is not a bug.

The default unit for coordinates is cm, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly.

Is this not the only situation where cm is the unit. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs.

But for "most" other situations the default unit is pt.

answered 1 hour ago

marmot

90.9k4104196

add a comment |

Some thoughts:

You're not doing anything incorrect.

Is it a bug? It is not a bug in the sense that the program crashes or that the result deviates from what one may expect from the manual. So my take it is not a bug.

The default unit for coordinates is cm, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly.

Is this not the only situation where cm is the unit. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs.

But for "most" other situations the default unit is pt.

answered 1 hour ago

marmot

90.9k4104196

add a comment |

Some thoughts:

You're not doing anything incorrect.

Is it a bug? It is not a bug in the sense that the program crashes or that the result deviates from what one may expect from the manual. So my take it is not a bug.

The default unit for coordinates is cm, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly.

Is this not the only situation where cm is the unit. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs.

But for "most" other situations the default unit is pt.

answered 1 hour ago

marmot

90.9k4104196

Some thoughts:

You're not doing anything incorrect.

Is it a bug? It is not a bug in the sense that the program crashes or that the result deviates from what one may expect from the manual. So my take it is not a bug.

The default unit for coordinates is cm, so at (1,0) and at (1cm,0) are equivalent. That's why the shift={(5,0)} and shift={(5cm,0)} can be used interchangedly.

Is this not the only situation where cm is the unit. Another situation in which the default unit is cm is a cricle, so draw (0,0) circle(1); gives you a circle of radius 1cm, similarly for arcs.

But for "most" other situations the default unit is pt.

answered 1 hour ago

marmot

90.9k4104196

answered 1 hour ago

marmot

90.9k4104196

answered 1 hour ago

marmot

90.9k4104196

answered 1 hour ago

marmot

90.9k4104196

add a comment |

In TikZ always the default unit for length values is pt. And we have

/tikz/xshift=<dimension>

So the default unit for xshift is pt.

In (1,0) you can think of cm as default unit but there is no default unit. Simply (1,0) is 1.x+0.y so it depends on the value of the x vector, which is initially set to (1cm,0).

edited 31 mins ago

answered 41 mins ago

Kpym

15.8k23986

add a comment |

In TikZ always the default unit for length values is pt. And we have

/tikz/xshift=<dimension>

So the default unit for xshift is pt.

In (1,0) you can think of cm as default unit but there is no default unit. Simply (1,0) is 1.x+0.y so it depends on the value of the x vector, which is initially set to (1cm,0).

edited 31 mins ago

answered 41 mins ago

Kpym

15.8k23986

add a comment |

In TikZ always the default unit for length values is pt. And we have

/tikz/xshift=<dimension>

So the default unit for xshift is pt.

In (1,0) you can think of cm as default unit but there is no default unit. Simply (1,0) is 1.x+0.y so it depends on the value of the x vector, which is initially set to (1cm,0).

edited 31 mins ago

answered 41 mins ago

Kpym

15.8k23986

In TikZ always the default unit for length values is pt. And we have

/tikz/xshift=<dimension>

So the default unit for xshift is pt.

In (1,0) you can think of cm as default unit but there is no default unit. Simply (1,0) is 1.x+0.y so it depends on the value of the x vector, which is initially set to (1cm,0).

edited 31 mins ago

answered 41 mins ago

Kpym

15.8k23986

edited 31 mins ago

answered 41 mins ago

Kpym

15.8k23986

answered 41 mins ago

Kpym

15.8k23986

answered 41 mins ago

Kpym

15.8k23986

add a comment |

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