Drawing boxes in matrices

up vote
4
down vote

favorite

In my document I have defined

newcommandbigzeromakebox(0,0)texthuge0

and using this the following matrix:

beginequationbeginpmatrix
0&1\
1&0&&&&bigzero\
&&0&1\
&&1&0\
&&&&ddots\
&bigzero&&&&0&1\
&&&&&1&0
endpmatrixendequation

How can I draw boxes around the three blocks which build the matrix?

asked Sep 9 at 20:30

user114179

add a commentÂ |Â

up vote
4
down vote

favorite

In my document I have defined

newcommandbigzeromakebox(0,0)texthuge0

and using this the following matrix:

beginequationbeginpmatrix
0&1\
1&0&&&&bigzero\
&&0&1\
&&1&0\
&&&&ddots\
&bigzero&&&&0&1\
&&&&&1&0
endpmatrixendequation

How can I draw boxes around the three blocks which build the matrix?

asked Sep 9 at 20:30

user114179

add a commentÂ |Â

up vote
4
down vote

favorite

In my document I have defined

newcommandbigzeromakebox(0,0)texthuge0

and using this the following matrix:

beginequationbeginpmatrix
0&1\
1&0&&&&bigzero\
&&0&1\
&&1&0\
&&&&ddots\
&bigzero&&&&0&1\
&&&&&1&0
endpmatrixendequation

How can I draw boxes around the three blocks which build the matrix?

asked Sep 9 at 20:30

user114179

In my document I have defined

newcommandbigzeromakebox(0,0)texthuge0

and using this the following matrix:

beginequationbeginpmatrix
0&1\
1&0&&&&bigzero\
&&0&1\
&&1&0\
&&&&ddots\
&bigzero&&&&0&1\
&&&&&1&0
endpmatrixendequation

How can I draw boxes around the three blocks which build the matrix?

math-mode matrices

asked Sep 9 at 20:30

user114179

asked Sep 9 at 20:30

user114179

asked Sep 9 at 20:30

user114179

asked Sep 9 at 20:30

user114179

asked Sep 9 at 20:30

user114179

add a commentÂ |Â

2 Answers
2

active

oldest

votes

up vote
3
down vote

accepted

A solution with basic tools:

documentclassarticle

usepackageamsmath
usepackagehhline
newcommandbigzeromakebox(0,0)texthuge0
newcommandfblock[1]beginarray@:cc@:
hhline#1 \
hhline
endarray

begindocument

beginequation
beginpmatrix
,fblock0&1\ 1&0 &&\
&mkern-9mufblock0&1\ 1&0&multicolumn2craisebox3exbigzero \
&&makebox[0pt]$ ddots $\[-0.5ex]
multicolumn2craisebox4exbigzero &&fblock0&1\ 1&0,
endpmatrixendequation

enddocument

enter image description here

answered Sep 9 at 21:33

Bernard

156k763189

add a commentÂ |Â

up vote
6
down vote

This is only a fun answer. I am trying out LoopSpace's great update of the tikzmark package, which has now a command in that I was always looking for: tikzmarknode. And it just works. (Yes, using tikz here may be an overkill, as I said, this is just for fun and to learn something new.) EDIT: Moved the brackets away from the boxes, big thanks to @manooooh!

documentclassarticle
usepackageamsmath,tikz
usetikzlibrarytikzmark,fit
newcommandbigzeromakebox(0,0)texthuge0
begindocument
beginequation
left(~beginmatrix
tikzmarknode1A0&1\
1&tikzmarknode1B0&&&&bigzero\
&&tikzmarknode2A0&1\
&&1&tikzmarknode2B0\
&&&&ddots\
&bigzero&&&&tikzmarknode3A0&1\
&&&&&1&tikzmarknode3B0
endmatrix~right)
begintikzpicture[overlay, remember picture]
foreach X in 1,2,3
node[inner sep=1pt,draw,fit=(X A)(X B)];
endtikzpicture
endequation
enddocument

enter image description here

edited yesterday

answered Sep 9 at 20:51

marmot

56.8k462124

+1, but I think the boxes are too stick to the braces of the matrix. Maybe using someting like left(;beginmatrix...endmatrix;right) would be ok?
â€“Â manooooh
Sep 9 at 20:54

1

@manooooh You are absolutely right. Yet this is really just for fun and to pay tribute to LoopSpace's updated package. In this case, you can easily produce a very simple fbox only solution by placing the 2x2 matrices in fboxes. I was actually not expecting to get any votes for that, just wanted to draw the attention to the updated library such that LoopSpace and I have company when testing it. ;-)
â€“Â marmot
Sep 9 at 20:58

1

@manooooh No, I am now on a promotion tour. Undoubtedly someone else will come and say this is a sledge hammer and it is possible to achieve the same with fboxes (which is true in this case, but not when the boxes should become a tiny bit more fancy). ;-)
â€“Â marmot
Sep 9 at 21:08

1

Very nice, but why is the bottom zero of the middle box misaligned?
â€“Â Max
2 days ago

2

The misalignment is actually from the previous line where you have ~~ after the 1 which adds a bit of space after the 1, thus seeming to push the 0 further out due to the centring of the matrix entries.
â€“Â Loop Space
yesterday

Â |Â
show 3 more comments

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
3
down vote

accepted

A solution with basic tools:

documentclassarticle

usepackageamsmath
usepackagehhline
newcommandbigzeromakebox(0,0)texthuge0
newcommandfblock[1]beginarray@:cc@:
hhline#1 \
hhline
endarray

begindocument

beginequation
beginpmatrix
,fblock0&1\ 1&0 &&\
&mkern-9mufblock0&1\ 1&0&multicolumn2craisebox3exbigzero \
&&makebox[0pt]$ ddots $\[-0.5ex]
multicolumn2craisebox4exbigzero &&fblock0&1\ 1&0,
endpmatrixendequation

enddocument

enter image description here

answered Sep 9 at 21:33

Bernard

156k763189

add a commentÂ |Â

up vote
3
down vote

accepted

A solution with basic tools:

documentclassarticle

usepackageamsmath
usepackagehhline
newcommandbigzeromakebox(0,0)texthuge0
newcommandfblock[1]beginarray@:cc@:
hhline#1 \
hhline
endarray

begindocument

beginequation
beginpmatrix
,fblock0&1\ 1&0 &&\
&mkern-9mufblock0&1\ 1&0&multicolumn2craisebox3exbigzero \
&&makebox[0pt]$ ddots $\[-0.5ex]
multicolumn2craisebox4exbigzero &&fblock0&1\ 1&0,
endpmatrixendequation

enddocument

enter image description here

answered Sep 9 at 21:33

Bernard

156k763189

add a commentÂ |Â

up vote
3
down vote

accepted

A solution with basic tools:

documentclassarticle

usepackageamsmath
usepackagehhline
newcommandbigzeromakebox(0,0)texthuge0
newcommandfblock[1]beginarray@:cc@:
hhline#1 \
hhline
endarray

begindocument

beginequation
beginpmatrix
,fblock0&1\ 1&0 &&\
&mkern-9mufblock0&1\ 1&0&multicolumn2craisebox3exbigzero \
&&makebox[0pt]$ ddots $\[-0.5ex]
multicolumn2craisebox4exbigzero &&fblock0&1\ 1&0,
endpmatrixendequation

enddocument

enter image description here

answered Sep 9 at 21:33

Bernard

156k763189

A solution with basic tools:

documentclassarticle

usepackageamsmath
usepackagehhline
newcommandbigzeromakebox(0,0)texthuge0
newcommandfblock[1]beginarray@:cc@:
hhline#1 \
hhline
endarray

begindocument

beginequation
beginpmatrix
,fblock0&1\ 1&0 &&\
&mkern-9mufblock0&1\ 1&0&multicolumn2craisebox3exbigzero \
&&makebox[0pt]$ ddots $\[-0.5ex]
multicolumn2craisebox4exbigzero &&fblock0&1\ 1&0,
endpmatrixendequation

enddocument

enter image description here

answered Sep 9 at 21:33

Bernard

156k763189

answered Sep 9 at 21:33

Bernard

156k763189

answered Sep 9 at 21:33

Bernard

156k763189

answered Sep 9 at 21:33

Bernard

156k763189

add a commentÂ |Â

up vote
6
down vote

documentclassarticle
usepackageamsmath,tikz
usetikzlibrarytikzmark,fit
newcommandbigzeromakebox(0,0)texthuge0
begindocument
beginequation
left(~beginmatrix
tikzmarknode1A0&1\
1&tikzmarknode1B0&&&&bigzero\
&&tikzmarknode2A0&1\
&&1&tikzmarknode2B0\
&&&&ddots\
&bigzero&&&&tikzmarknode3A0&1\
&&&&&1&tikzmarknode3B0
endmatrix~right)
begintikzpicture[overlay, remember picture]
foreach X in 1,2,3
node[inner sep=1pt,draw,fit=(X A)(X B)];
endtikzpicture
endequation
enddocument

enter image description here

edited yesterday

answered Sep 9 at 20:51

marmot

56.8k462124

+1, but I think the boxes are too stick to the braces of the matrix. Maybe using someting like left(;beginmatrix...endmatrix;right) would be ok?
â€“Â manooooh
Sep 9 at 20:54

1

@manooooh You are absolutely right. Yet this is really just for fun and to pay tribute to LoopSpace's updated package. In this case, you can easily produce a very simple fbox only solution by placing the 2x2 matrices in fboxes. I was actually not expecting to get any votes for that, just wanted to draw the attention to the updated library such that LoopSpace and I have company when testing it. ;-)
â€“Â marmot
Sep 9 at 20:58

1

@manooooh No, I am now on a promotion tour. Undoubtedly someone else will come and say this is a sledge hammer and it is possible to achieve the same with fboxes (which is true in this case, but not when the boxes should become a tiny bit more fancy). ;-)
â€“Â marmot
Sep 9 at 21:08

1

Very nice, but why is the bottom zero of the middle box misaligned?
â€“Â Max
2 days ago

2

The misalignment is actually from the previous line where you have ~~ after the 1 which adds a bit of space after the 1, thus seeming to push the 0 further out due to the centring of the matrix entries.
â€“Â Loop Space
yesterday

Â |Â
show 3 more comments

up vote
6
down vote

documentclassarticle
usepackageamsmath,tikz
usetikzlibrarytikzmark,fit
newcommandbigzeromakebox(0,0)texthuge0
begindocument
beginequation
left(~beginmatrix
tikzmarknode1A0&1\
1&tikzmarknode1B0&&&&bigzero\
&&tikzmarknode2A0&1\
&&1&tikzmarknode2B0\
&&&&ddots\
&bigzero&&&&tikzmarknode3A0&1\
&&&&&1&tikzmarknode3B0
endmatrix~right)
begintikzpicture[overlay, remember picture]
foreach X in 1,2,3
node[inner sep=1pt,draw,fit=(X A)(X B)];
endtikzpicture
endequation
enddocument

enter image description here

edited yesterday

answered Sep 9 at 20:51

marmot

56.8k462124

+1, but I think the boxes are too stick to the braces of the matrix. Maybe using someting like left(;beginmatrix...endmatrix;right) would be ok?
â€“Â manooooh
Sep 9 at 20:54

1

@manooooh You are absolutely right. Yet this is really just for fun and to pay tribute to LoopSpace's updated package. In this case, you can easily produce a very simple fbox only solution by placing the 2x2 matrices in fboxes. I was actually not expecting to get any votes for that, just wanted to draw the attention to the updated library such that LoopSpace and I have company when testing it. ;-)
â€“Â marmot
Sep 9 at 20:58

1

@manooooh No, I am now on a promotion tour. Undoubtedly someone else will come and say this is a sledge hammer and it is possible to achieve the same with fboxes (which is true in this case, but not when the boxes should become a tiny bit more fancy). ;-)
â€“Â marmot
Sep 9 at 21:08

1

Very nice, but why is the bottom zero of the middle box misaligned?
â€“Â Max
2 days ago

2

The misalignment is actually from the previous line where you have ~~ after the 1 which adds a bit of space after the 1, thus seeming to push the 0 further out due to the centring of the matrix entries.
â€“Â Loop Space
yesterday

Â |Â
show 3 more comments

up vote
6
down vote

documentclassarticle
usepackageamsmath,tikz
usetikzlibrarytikzmark,fit
newcommandbigzeromakebox(0,0)texthuge0
begindocument
beginequation
left(~beginmatrix
tikzmarknode1A0&1\
1&tikzmarknode1B0&&&&bigzero\
&&tikzmarknode2A0&1\
&&1&tikzmarknode2B0\
&&&&ddots\
&bigzero&&&&tikzmarknode3A0&1\
&&&&&1&tikzmarknode3B0
endmatrix~right)
begintikzpicture[overlay, remember picture]
foreach X in 1,2,3
node[inner sep=1pt,draw,fit=(X A)(X B)];
endtikzpicture
endequation
enddocument

enter image description here

edited yesterday

answered Sep 9 at 20:51

marmot

56.8k462124

documentclassarticle
usepackageamsmath,tikz
usetikzlibrarytikzmark,fit
newcommandbigzeromakebox(0,0)texthuge0
begindocument
beginequation
left(~beginmatrix
tikzmarknode1A0&1\
1&tikzmarknode1B0&&&&bigzero\
&&tikzmarknode2A0&1\
&&1&tikzmarknode2B0\
&&&&ddots\
&bigzero&&&&tikzmarknode3A0&1\
&&&&&1&tikzmarknode3B0
endmatrix~right)
begintikzpicture[overlay, remember picture]
foreach X in 1,2,3
node[inner sep=1pt,draw,fit=(X A)(X B)];
endtikzpicture
endequation
enddocument

enter image description here

edited yesterday

answered Sep 9 at 20:51

marmot

56.8k462124

edited yesterday

answered Sep 9 at 20:51

marmot

56.8k462124

answered Sep 9 at 20:51

marmot

56.8k462124

answered Sep 9 at 20:51

marmot

56.8k462124

+1, but I think the boxes are too stick to the braces of the matrix. Maybe using someting like left(;beginmatrix...endmatrix;right) would be ok?
â€“Â manooooh
Sep 9 at 20:54

1

@manooooh You are absolutely right. Yet this is really just for fun and to pay tribute to LoopSpace's updated package. In this case, you can easily produce a very simple fbox only solution by placing the 2x2 matrices in fboxes. I was actually not expecting to get any votes for that, just wanted to draw the attention to the updated library such that LoopSpace and I have company when testing it. ;-)
â€“Â marmot
Sep 9 at 20:58

1

@manooooh No, I am now on a promotion tour. Undoubtedly someone else will come and say this is a sledge hammer and it is possible to achieve the same with fboxes (which is true in this case, but not when the boxes should become a tiny bit more fancy). ;-)
â€“Â marmot
Sep 9 at 21:08

1

Very nice, but why is the bottom zero of the middle box misaligned?
â€“Â Max
2 days ago

2

The misalignment is actually from the previous line where you have ~~ after the 1 which adds a bit of space after the 1, thus seeming to push the 0 further out due to the centring of the matrix entries.
â€“Â Loop Space
yesterday

Â |Â
show 3 more comments

+1, but I think the boxes are too stick to the braces of the matrix. Maybe using someting like left(;beginmatrix...endmatrix;right) would be ok?
â€“Â manooooh
Sep 9 at 20:54

1

@manooooh You are absolutely right. Yet this is really just for fun and to pay tribute to LoopSpace's updated package. In this case, you can easily produce a very simple fbox only solution by placing the 2x2 matrices in fboxes. I was actually not expecting to get any votes for that, just wanted to draw the attention to the updated library such that LoopSpace and I have company when testing it. ;-)
â€“Â marmot
Sep 9 at 20:58

1

@manooooh No, I am now on a promotion tour. Undoubtedly someone else will come and say this is a sledge hammer and it is possible to achieve the same with fboxes (which is true in this case, but not when the boxes should become a tiny bit more fancy). ;-)
â€“Â marmot
Sep 9 at 21:08

1

Very nice, but why is the bottom zero of the middle box misaligned?
â€“Â Max
2 days ago

2

The misalignment is actually from the previous line where you have ~~ after the 1 which adds a bit of space after the 1, thus seeming to push the 0 further out due to the centring of the matrix entries.
â€“Â Loop Space
yesterday

+1, but I think the boxes are too stick to the braces of the matrix. Maybe using someting like left(;beginmatrix...endmatrix;right) would be ok?
â€“Â manooooh
Sep 9 at 20:54

@manooooh You are absolutely right. Yet this is really just for fun and to pay tribute to LoopSpace's updated package. In this case, you can easily produce a very simple fbox only solution by placing the 2x2 matrices in fboxes. I was actually not expecting to get any votes for that, just wanted to draw the attention to the updated library such that LoopSpace and I have company when testing it. ;-)
â€“Â marmot
Sep 9 at 20:58

@manooooh No, I am now on a promotion tour. Undoubtedly someone else will come and say this is a sledge hammer and it is possible to achieve the same with fboxes (which is true in this case, but not when the boxes should become a tiny bit more fancy). ;-)
â€“Â marmot
Sep 9 at 21:08

Very nice, but why is the bottom zero of the middle box misaligned?
â€“Â Max
2 days ago

The misalignment is actually from the previous line where you have ~~ after the 1 which adds a bit of space after the 1, thus seeming to push the 0 further out due to the centring of the matrix entries.
â€“Â Loop Space
yesterday

Â |Â
show 3 more comments

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