How to typeset an array











up vote
1
down vote

favorite












I would like to produce the following:



enter image description here



what is the error?



documentclass{article}

   usepackage{tikz}

   usepackage{float}

   usepackage{amsmath}

   usepackage{copyrightbox}

    begin{document}

    [

        begin{array}

          0.5 & -1 & -0.5

       end{array}

    ]



 end{document}





math-mode errors amsmath arrays







share|improve this question




























    up vote
    1
    down vote

    favorite












    I would like to produce the following:



    enter image description here



    what is the error?



    documentclass{article}
    
   usepackage{tikz}
    
   usepackage{float}
    
   usepackage{amsmath}
    
   usepackage{copyrightbox}
    
    begin{document}
    
    [
    
        begin{array}
    
          0.5 & -1 & -0.5
    
       end{array}
    
    ]
    

    
 end{document}





    math-mode errors amsmath arrays







    share|improve this question


























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I would like to produce the following:



      enter image description here



      what is the error?



      documentclass{article}
      
   usepackage{tikz}
      
   usepackage{float}
      
   usepackage{amsmath}
      
   usepackage{copyrightbox}
      
    begin{document}
      
    [
      
        begin{array}
      
          0.5 & -1 & -0.5
      
       end{array}
      
    ]
      

      
 end{document}





      math-mode errors amsmath arrays







      share|improve this question















      I would like to produce the following:



      enter image description here



      what is the error?



      documentclass{article}
      
   usepackage{tikz}
      
   usepackage{float}
      
   usepackage{amsmath}
      
   usepackage{copyrightbox}
      
    begin{document}
      
    [
      
        begin{array}
      
          0.5 & -1 & -0.5
      
       end{array}
      
    ]
      

      
 end{document}





      math-mode errors amsmath arrays




      math-mode errors amsmath arrays






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 30 mins ago









      Alan Munn

      157k27421695




      157k27421695










      asked 2 hours ago









      hubman

      1915




      1915






















          1 Answer
          1






          active

          oldest

          votes

















          up vote
          1
          down vote



          accepted










          since you use the amsmath package, why you not use bmatrix environment?



          using array you need to specify columns (see second equation below)



          documentclass{article}
          
usepackage{tikz}
          
usepackage{float}
          
usepackage{amsmath}        
          
usepackage{copyrightbox}
          
begin{document}
          
[
          
mathbf{W} = begin{bmatrix}
          
                0.5 & -1 & -0.5
          
            end{bmatrix}
          
qquad  b=0.5
          
]
          
or 
          
[
          
mathbf{W} = [begin{array}{ccc} % <--- added columns' types
          
                0.5 & -1 & -0.5
          
              end{array}]    
          
qquad  b=0.5
          
]
          
end{document}


          enter image description here






          share|improve this answer























          • how written b=0.5 in the same line?
            – hubman
            2 hours ago






          • 1




            this was not very clear in your question, now added.
            – Zarko
            2 hours ago











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          1 Answer
          1






          active

          oldest

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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          1
          down vote



          accepted










          since you use the amsmath package, why you not use bmatrix environment?



          using array you need to specify columns (see second equation below)



          documentclass{article}
          
usepackage{tikz}
          
usepackage{float}
          
usepackage{amsmath}        
          
usepackage{copyrightbox}
          
begin{document}
          
[
          
mathbf{W} = begin{bmatrix}
          
                0.5 & -1 & -0.5
          
            end{bmatrix}
          
qquad  b=0.5
          
]
          
or 
          
[
          
mathbf{W} = [begin{array}{ccc} % <--- added columns' types
          
                0.5 & -1 & -0.5
          
              end{array}]    
          
qquad  b=0.5
          
]
          
end{document}


          enter image description here






          share|improve this answer























          • how written b=0.5 in the same line?
            – hubman
            2 hours ago






          • 1




            this was not very clear in your question, now added.
            – Zarko
            2 hours ago















          up vote
          1
          down vote



          accepted










          since you use the amsmath package, why you not use bmatrix environment?



          using array you need to specify columns (see second equation below)



          documentclass{article}
          
usepackage{tikz}
          
usepackage{float}
          
usepackage{amsmath}        
          
usepackage{copyrightbox}
          
begin{document}
          
[
          
mathbf{W} = begin{bmatrix}
          
                0.5 & -1 & -0.5
          
            end{bmatrix}
          
qquad  b=0.5
          
]
          
or 
          
[
          
mathbf{W} = [begin{array}{ccc} % <--- added columns' types
          
                0.5 & -1 & -0.5
          
              end{array}]    
          
qquad  b=0.5
          
]
          
end{document}


          enter image description here






          share|improve this answer























          • how written b=0.5 in the same line?
            – hubman
            2 hours ago






          • 1




            this was not very clear in your question, now added.
            – Zarko
            2 hours ago













          up vote
          1
          down vote



          accepted







          up vote
          1
          down vote



          accepted






          since you use the amsmath package, why you not use bmatrix environment?



          using array you need to specify columns (see second equation below)



          documentclass{article}
          
usepackage{tikz}
          
usepackage{float}
          
usepackage{amsmath}        
          
usepackage{copyrightbox}
          
begin{document}
          
[
          
mathbf{W} = begin{bmatrix}
          
                0.5 & -1 & -0.5
          
            end{bmatrix}
          
qquad  b=0.5
          
]
          
or 
          
[
          
mathbf{W} = [begin{array}{ccc} % <--- added columns' types
          
                0.5 & -1 & -0.5
          
              end{array}]    
          
qquad  b=0.5
          
]
          
end{document}


          enter image description here






          share|improve this answer














          since you use the amsmath package, why you not use bmatrix environment?



          using array you need to specify columns (see second equation below)



          documentclass{article}
          
usepackage{tikz}
          
usepackage{float}
          
usepackage{amsmath}        
          
usepackage{copyrightbox}
          
begin{document}
          
[
          
mathbf{W} = begin{bmatrix}
          
                0.5 & -1 & -0.5
          
            end{bmatrix}
          
qquad  b=0.5
          
]
          
or 
          
[
          
mathbf{W} = [begin{array}{ccc} % <--- added columns' types
          
                0.5 & -1 & -0.5
          
              end{array}]    
          
qquad  b=0.5
          
]
          
end{document}


          enter image description here







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 2 hours ago

























          answered 2 hours ago









          Zarko

          117k865155




          117k865155












          • how written b=0.5 in the same line?
            – hubman
            2 hours ago






          • 1




            this was not very clear in your question, now added.
            – Zarko
            2 hours ago


















          • how written b=0.5 in the same line?
            – hubman
            2 hours ago






          • 1




            this was not very clear in your question, now added.
            – Zarko
            2 hours ago
















          how written b=0.5 in the same line?
          – hubman
          2 hours ago




          how written b=0.5 in the same line?
          – hubman
          2 hours ago




          1




          1




          this was not very clear in your question, now added.
          – Zarko
          2 hours ago




          this was not very clear in your question, now added.
          – Zarko
          2 hours ago


















           

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