Why isn't ddots working while vdots works?












0














I have the following matrix



usepackage{amsmath}
usepackage{amssymb}

$$
M=begin{bmatrix}
frac{partial f_1}{partial x_1}(p) & frac{partial f_1}{partial x_2}(p) & cdots & frac{partial f_1}{partial x_n}(p) \
frac{partial f_2}{partial x_1}(p) & frac{partial f_2}{partial x_2}(p) & cdots & frac{partial f_2}{partial x_n}(p) \
$vdots$ & $vdots$ & $vdots$ & $vdots$ \
frac{partial f_m}{partial x_1}(p) & frac{partial f_m}{partial x_2}(p) & cdots & frac{partial f_m}{partial x_n}(p) \

end{bmatrix}$$


which complies nicely. However, in the third line of the matrix, I would like to change the third "vdots" to a "ddots". If I do so, I get the following error:




LaTex Warning: No author given.



(The directory on my computer)



!Missing $ inserted.



< inserted text >



$



I.72 $vdots$ & $vdots$ & $ddots



$ & $vdots$



?




Could anybody help please?










share|improve this question




















  • 1




    It only "compiles nicely" if you ignore the error messages. Everything between $$…$$ is already in math mode, so you don't need more $...$ around the vdots
    – alephzero
    18 mins ago






  • 1




    @marmot LOL fixed it
    – Ovi
    14 mins ago










  • @alephzero Ah thanks got it; unfortunately I am using TexWorks and when it complies it does not open the window with the error messages, so I was not aware I had any.
    – Ovi
    13 mins ago










  • You might want to replace $$ ... $$ by [ .. ], add a documentclass, begin{document} and end{document}.
    – marmot
    9 mins ago










  • @marmot I have the begin/end document and document class; I just wanted to show the packages I was using in case it affected the answer. That's interesting, I didn't know that [ could replace $$. I am used to the latter from math.stackexchange. Is there any benefit to using the former?
    – Ovi
    6 mins ago


















0














I have the following matrix



usepackage{amsmath}
usepackage{amssymb}

$$
M=begin{bmatrix}
frac{partial f_1}{partial x_1}(p) & frac{partial f_1}{partial x_2}(p) & cdots & frac{partial f_1}{partial x_n}(p) \
frac{partial f_2}{partial x_1}(p) & frac{partial f_2}{partial x_2}(p) & cdots & frac{partial f_2}{partial x_n}(p) \
$vdots$ & $vdots$ & $vdots$ & $vdots$ \
frac{partial f_m}{partial x_1}(p) & frac{partial f_m}{partial x_2}(p) & cdots & frac{partial f_m}{partial x_n}(p) \

end{bmatrix}$$


which complies nicely. However, in the third line of the matrix, I would like to change the third "vdots" to a "ddots". If I do so, I get the following error:




LaTex Warning: No author given.



(The directory on my computer)



!Missing $ inserted.



< inserted text >



$



I.72 $vdots$ & $vdots$ & $ddots



$ & $vdots$



?




Could anybody help please?










share|improve this question




















  • 1




    It only "compiles nicely" if you ignore the error messages. Everything between $$…$$ is already in math mode, so you don't need more $...$ around the vdots
    – alephzero
    18 mins ago






  • 1




    @marmot LOL fixed it
    – Ovi
    14 mins ago










  • @alephzero Ah thanks got it; unfortunately I am using TexWorks and when it complies it does not open the window with the error messages, so I was not aware I had any.
    – Ovi
    13 mins ago










  • You might want to replace $$ ... $$ by [ .. ], add a documentclass, begin{document} and end{document}.
    – marmot
    9 mins ago










  • @marmot I have the begin/end document and document class; I just wanted to show the packages I was using in case it affected the answer. That's interesting, I didn't know that [ could replace $$. I am used to the latter from math.stackexchange. Is there any benefit to using the former?
    – Ovi
    6 mins ago
















0












0








0







I have the following matrix



usepackage{amsmath}
usepackage{amssymb}

$$
M=begin{bmatrix}
frac{partial f_1}{partial x_1}(p) & frac{partial f_1}{partial x_2}(p) & cdots & frac{partial f_1}{partial x_n}(p) \
frac{partial f_2}{partial x_1}(p) & frac{partial f_2}{partial x_2}(p) & cdots & frac{partial f_2}{partial x_n}(p) \
$vdots$ & $vdots$ & $vdots$ & $vdots$ \
frac{partial f_m}{partial x_1}(p) & frac{partial f_m}{partial x_2}(p) & cdots & frac{partial f_m}{partial x_n}(p) \

end{bmatrix}$$


which complies nicely. However, in the third line of the matrix, I would like to change the third "vdots" to a "ddots". If I do so, I get the following error:




LaTex Warning: No author given.



(The directory on my computer)



!Missing $ inserted.



< inserted text >



$



I.72 $vdots$ & $vdots$ & $ddots



$ & $vdots$



?




Could anybody help please?










share|improve this question















I have the following matrix



usepackage{amsmath}
usepackage{amssymb}

$$
M=begin{bmatrix}
frac{partial f_1}{partial x_1}(p) & frac{partial f_1}{partial x_2}(p) & cdots & frac{partial f_1}{partial x_n}(p) \
frac{partial f_2}{partial x_1}(p) & frac{partial f_2}{partial x_2}(p) & cdots & frac{partial f_2}{partial x_n}(p) \
$vdots$ & $vdots$ & $vdots$ & $vdots$ \
frac{partial f_m}{partial x_1}(p) & frac{partial f_m}{partial x_2}(p) & cdots & frac{partial f_m}{partial x_n}(p) \

end{bmatrix}$$


which complies nicely. However, in the third line of the matrix, I would like to change the third "vdots" to a "ddots". If I do so, I get the following error:




LaTex Warning: No author given.



(The directory on my computer)



!Missing $ inserted.



< inserted text >



$



I.72 $vdots$ & $vdots$ & $ddots



$ & $vdots$



?




Could anybody help please?







errors amsmath






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 15 mins ago

























asked 26 mins ago









Ovi

1284




1284








  • 1




    It only "compiles nicely" if you ignore the error messages. Everything between $$…$$ is already in math mode, so you don't need more $...$ around the vdots
    – alephzero
    18 mins ago






  • 1




    @marmot LOL fixed it
    – Ovi
    14 mins ago










  • @alephzero Ah thanks got it; unfortunately I am using TexWorks and when it complies it does not open the window with the error messages, so I was not aware I had any.
    – Ovi
    13 mins ago










  • You might want to replace $$ ... $$ by [ .. ], add a documentclass, begin{document} and end{document}.
    – marmot
    9 mins ago










  • @marmot I have the begin/end document and document class; I just wanted to show the packages I was using in case it affected the answer. That's interesting, I didn't know that [ could replace $$. I am used to the latter from math.stackexchange. Is there any benefit to using the former?
    – Ovi
    6 mins ago
















  • 1




    It only "compiles nicely" if you ignore the error messages. Everything between $$…$$ is already in math mode, so you don't need more $...$ around the vdots
    – alephzero
    18 mins ago






  • 1




    @marmot LOL fixed it
    – Ovi
    14 mins ago










  • @alephzero Ah thanks got it; unfortunately I am using TexWorks and when it complies it does not open the window with the error messages, so I was not aware I had any.
    – Ovi
    13 mins ago










  • You might want to replace $$ ... $$ by [ .. ], add a documentclass, begin{document} and end{document}.
    – marmot
    9 mins ago










  • @marmot I have the begin/end document and document class; I just wanted to show the packages I was using in case it affected the answer. That's interesting, I didn't know that [ could replace $$. I am used to the latter from math.stackexchange. Is there any benefit to using the former?
    – Ovi
    6 mins ago










1




1




It only "compiles nicely" if you ignore the error messages. Everything between $$…$$ is already in math mode, so you don't need more $...$ around the vdots
– alephzero
18 mins ago




It only "compiles nicely" if you ignore the error messages. Everything between $$…$$ is already in math mode, so you don't need more $...$ around the vdots
– alephzero
18 mins ago




1




1




@marmot LOL fixed it
– Ovi
14 mins ago




@marmot LOL fixed it
– Ovi
14 mins ago












@alephzero Ah thanks got it; unfortunately I am using TexWorks and when it complies it does not open the window with the error messages, so I was not aware I had any.
– Ovi
13 mins ago




@alephzero Ah thanks got it; unfortunately I am using TexWorks and when it complies it does not open the window with the error messages, so I was not aware I had any.
– Ovi
13 mins ago












You might want to replace $$ ... $$ by [ .. ], add a documentclass, begin{document} and end{document}.
– marmot
9 mins ago




You might want to replace $$ ... $$ by [ .. ], add a documentclass, begin{document} and end{document}.
– marmot
9 mins ago












@marmot I have the begin/end document and document class; I just wanted to show the packages I was using in case it affected the answer. That's interesting, I didn't know that [ could replace $$. I am used to the latter from math.stackexchange. Is there any benefit to using the former?
– Ovi
6 mins ago






@marmot I have the begin/end document and document class; I just wanted to show the packages I was using in case it affected the answer. That's interesting, I didn't know that [ could replace $$. I am used to the latter from math.stackexchange. Is there any benefit to using the former?
– Ovi
6 mins ago

















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