Let's say I have
double a[N][M] = { .......};
How to transform a into a 2D vector
vector< vector<double v
?
double a[N][M] = { .......};
How to transform a into a 2D vector
vector< vector<double v
?
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Re: What's the most efficient way to transform a 2d array into a 2dvector
But if you wanted that why wouldyou start off with a plain 2D array in the first place.
If you wanna initialize a 2D vector (12x2) with the following data:
-5, -5,
-5, 105,
105, 105,
105, -5,
60, -5,
60, 40,
70, 40,
70, 60,
30, 60,
30, 40,
40, 40,
40, -5,
How do you do that?
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Re: What's the most efficient way to transform a 2d array into a 2dvector
On Fri, 04 Apr 2008 11:43:10 -0700, xz wrote:
int arr[2][2]={{-5,-5,},{-5,105}};>>But if you wanted that why would
>you start off with a plain 2D array in the first place.
>
If you wanna initialize a 2D vector (12x2) with the following data:
>
-5, -5,
-5, 105,
105, 105,
105, -5,
60, -5,
60, 40,
70, 40,
70, 60,
30, 60,
30, 40,
40, 40,
40, -5,
>
>
How do you do that?
You can probably figure out the rest...
Comment
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Re: What's the most efficient way to transform a 2d array into a 2dvector
On Apr 4, 11:43 pm, xz <zhang.xi...@gm ail.comwrote:If that is the case, then why do you want to use a vector at all? Why>But if you wanted that why would
you start off with a plain 2D array in the first place.
If you wanna initialize a 2D vector (12x2) with the following data:
>
-5, -5,
-5, 105,
105, 105,
105, -5,
60, -5,
60, 40,
70, 40,
70, 60,
30, 60,
30, 40,
40, 40,
40, -5,
>
How do you do that?
don't you work with the arrays only or something like boost:array?
vectors are not a complete replacement of arrays especially when
arrays know their size (and they don't grow) and elements at the time
of creation.
Comment
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Re: What's the most efficient way to transform a 2d array into a 2dvector
On Apr 5, 1:07 am, Abhishek Padmanabh <abhishek.padma n...@gmail.com>
wrote:What if I want to use some function that reads vector instead ofOn Apr 4, 11:43 pm, xz <zhang.xi...@gm ail.comwrote:
>
>
>>But if you wanted that why would
you start off with a plain 2D array in the first place.>If you wanna initialize a 2D vector (12x2) with the following data:>-5, -5,
-5, 105,
105, 105,
105, -5,
60, -5,
60, 40,
70, 40,
70, 60,
30, 60,
30, 40,
40, 40,
40, -5,>How do you do that?
If that is the case, then why do you want to use a vector at all? Why
don't you work with the arrays only or something like boost:array?
vectors are not a complete replacement of arrays especially when
arrays know their size (and they don't grow) and elements at the time
of creation.
array?
Comment
Comment