Construir matrices

Si ya conocemos el tamaño de la matriz:



In [1]:

    
zeros(10)









    Out[1]:





10-element Array{Float64,1}:
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0



In [2]:

    
zeros(3, 7)









    Out[2]:





3x7 Array{Float64,2}:
 0.0  0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0  0.0
 0.0  0.0  0.0  0.0  0.0  0.0  0.0



In [3]:

    
zeros(2,3,4,5)









    Out[3]:





2x3x4x5 Array{Float64,4}:
[:, :, 1, 1] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 2, 1] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 3, 1] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 4, 1] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 1, 2] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 2, 2] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 3, 2] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 4, 2] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 1, 3] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 2, 3] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 3, 3] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 4, 3] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 1, 4] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 2, 4] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 3, 4] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 4, 4] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 1, 5] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 2, 5] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 3, 5] =
 0.0  0.0  0.0
 0.0  0.0  0.0

[:, :, 4, 5] =
 0.0  0.0  0.0
 0.0  0.0  0.0



In [4]:

    
M = Int[]









    Out[4]:





0-element Array{Int64,1}



In [5]:

    
push!(M, 10)









    Out[5]:





1-element Array{Int64,1}:
 10



In [9]:

    
M = Any[]









    Out[9]:





0-element Array{Any,1}



In [10]:

    
push!(M, 10)
push!(M, 10.5)
push!(M, "hola")









    Out[10]:





3-element Array{Any,1}:
 10      
 10.5    
   "hola"



In [11]:

    
push!(M, [3, 4])









    Out[11]:





4-element Array{Any,1}:
 10      
 10.5    
   "hola"
   [3,4]



In [20]:

    
M = Vector{Float64}[]









    Out[20]:





0-element Array{Array{Float64,1},1}



In [21]:

    
push!(M, [3, 4, 5])









    Out[21]:





1-element Array{Array{Float64,1},1}:
 [3.0,4.0,5.0]



In [23]:

    
push!(M, [6, 7, 8])









    Out[23]:





2-element Array{Array{Float64,1},1}:
 [3.0,4.0,5.0]
 [6.0,7.0,8.0]



In [18]:

    
A = Array(Any, 3, 4)









    Out[18]:





3x4 Array{Any,2}:
 #undef  #undef  #undef  #undef
 #undef  #undef  #undef  #undef
 #undef  #undef  #undef  #undef



In [19]:

    
A[1,2]









    



access to undefined reference
while loading In[19], in expression starting on line 1

 in getindex at array.jl:247



In [24]:

    
M









    Out[24]:





2-element Array{Array{Float64,1},1}:
 [3.0,4.0,5.0]
 [6.0,7.0,8.0]



In [35]:

    
hcat(M[1], M[2])









    Out[35]:





3x2 Array{Float64,2}:
 3.0  6.0
 4.0  7.0
 5.0  8.0



In [37]:

    
vcat(M[1]', M[2]')









    Out[37]:





2x3 Array{Float64,2}:
 3.0  4.0  5.0
 6.0  7.0  8.0



In [38]:

    
for i in 1:10
    push!(M, [3,4,5])
end



In [39]:

    
M









    Out[39]:





12-element Array{Array{Float64,1},1}:
 [3.0,4.0,5.0]
 [6.0,7.0,8.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]
 [3.0,4.0,5.0]



In [41]:

    
hcat(M...)'









    Out[41]:





12x3 Array{Float64,2}:
 3.0  4.0  5.0
 6.0  7.0  8.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0
 3.0  4.0  5.0



In [ ]: