如何从静态数组制作动态数组 [英] How to make dynamic array from static array
问题描述
我在使用静态数组时遇到了麻烦，我需要使用动态数组进行更新，有人可以帮助我吗？因为如果我有很多数据，而且必须按1创建1，将非常困难。
I have trouble with my static array, i need to update with dynamic array can someone help me ? because will be so hard if i have alot data and i must create 1 by 1.
$ kriteria = [C1，C2，C3，C4，C5，C6];
$kriteria = [C1,C2,C3,C4,C5,C6];
$ alternatif = [ALT1，ALT2，ALT，ALT4，ALT5，ALT6，ALT7];
$alternatif = [ALT1,ALT2,ALT,ALT4,ALT5,ALT6,ALT7];
$nEntropy = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
$nEntropy[$i] = (((-1)/log(7)) *(
($probabilitas[0][0]*log($probabilitas[0][0]))+
($probabilitas[1][0]*log($probabilitas[1][0]))+
($probabilitas[2][0]*log($probabilitas[2][0]))+
($probabilitas[3][0]*log($probabilitas[3][0]))+
($probabilitas[4][0]*log($probabilitas[4][0]))+
($probabilitas[5][0]*log($probabilitas[5][0]))+
($probabilitas[6][0]*log($probabilitas[6][0]))
));
}
}
$nEntropy1 = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
$nEntropy1[$i] = (((-1)/log(7)) *(
($probabilitas[0][1]*log($probabilitas[0][1]))+
($probabilitas[1][1]*log($probabilitas[1][1]))+
($probabilitas[2][1]*log($probabilitas[2][1]))+
($probabilitas[3][1]*log($probabilitas[3][1]))+
($probabilitas[4][1]*log($probabilitas[4][1]))+
($probabilitas[5][1]*log($probabilitas[5][1]))+
($probabilitas[6][1]*log($probabilitas[6][1]))
));
}
}
$nEntropy2 = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
$nEntropy2[$i] = (((-1)/log(7)) *(
($probabilitas[0][2]*log($probabilitas[0][2]))+
($probabilitas[1][2]*log($probabilitas[1][2]))+
($probabilitas[2][2]*log($probabilitas[2][2]))+
($probabilitas[3][2]*log($probabilitas[3][2]))+
($probabilitas[4][2]*log($probabilitas[4][2]))+
($probabilitas[5][2]*log($probabilitas[5][2]))+
($probabilitas[6][2]*log($probabilitas[6][2]))
));
}
}
$nEntropy3 = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
$nEntropy3[$i] = (((-1)/log(7)) *(
($probabilitas[0][3]*log($probabilitas[0][3]))+
($probabilitas[1][3]*log($probabilitas[1][3]))+
($probabilitas[2][3]*log($probabilitas[2][3]))+
($probabilitas[3][3]*log($probabilitas[3][3]))+
($probabilitas[4][3]*log($probabilitas[4][3]))+
($probabilitas[5][3]*log($probabilitas[5][3]))+
($probabilitas[6][3]*log($probabilitas[6][3]))
));
}
}
$nEntropyy4 = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
$nEntropy4[$i] = (((-1)/log(7)) *(
($probabilitas[0][4]*log($probabilitas[0][4]))+
($probabilitas[1][4]*log($probabilitas[1][4]))+
($probabilitas[2][4]*log($probabilitas[2][4]))+
($probabilitas[3][4]*log($probabilitas[3][4]))+
($probabilitas[4][4]*log($probabilitas[4][4]))+
($probabilitas[5][4]*log($probabilitas[5][4]))+
($probabilitas[6][4]*log($probabilitas[6][4]))
));
}
}
$nEntropy5 = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
$nEntropy5[$i] = (((-1)/log(7)) *(
($probabilitas[0][5]*log($probabilitas[0][5]))+
($probabilitas[1][5]*log($probabilitas[1][5]))+
($probabilitas[2][5]*log($probabilitas[2][5]))+
($probabilitas[3][5]*log($probabilitas[3][5]))+
($probabilitas[4][5]*log($probabilitas[4][5]))+
($probabilitas[5][5]*log($probabilitas[5][5]))+
($probabilitas[6][5]*log($probabilitas[6][5]))
));
}
}
showb($nEntropy);
showb($nEntropy1);
showb($nEntropy2);
showb($nEntropy3);
showb($nEntropy4);
showb($nEntropy5);
我的结果的这张图片
，如您所见，我的代码确实是静态的，并且如果我有很多数据
则很难，而且我也需要像这样的结果
this image for my results as you can see my code really static and so hard if i have alot data and also i need my results likes this
编辑
VörösAmadea的答案是正确的，但仍然缺少一些答案，关于结果的第二个问题仍然是大量。有没有办法只显示一次？
，就像您之前在我的图像上看到的那样，我需要删除重复的数据，因此每个显示的人只有1个，并将其存储到数组中。
EDIT the answers from Vörös Amadea are correct, but there are still some that are lacking, my second question regarding the results is still in large numbers. is there a way to display it only once? as u can see on my image before, i need to remove duplicate data so only 1 for each is who will displayed and store it into array.
我已经修改了VörösAmadea的一些代码，因为如果不进行修改，我出现错误未定义的变量：概率
I have modified a little code from Vörös Amadea because if I don't modify it, I get an error "Undefined variable: probability"
这是我修改过的代码。
for($x=0;$x<1;$x++){
$nth = $x;
$entz = array();
for ($i=0;$i<count($kriteria);$i++)
{
for ($j=0;$j<count($alternatif);$j++)
{
${"entz$nth"}[$i] = (((-1)/log(7)) *(
($probabilitas[0][$nth]*log($probabilitas[0][$nth]))+
($probabilitas[1][$nth]*log($probabilitas[1][$nth]))+
($probabilitas[2][$nth]*log($probabilitas[2][$nth]))+
($probabilitas[3][$nth]*log($probabilitas[3][$nth]))+
($probabilitas[4][$nth]*log($probabilitas[4][$nth]))+
($probabilitas[5][$nth]*log($probabilitas[5][$nth]))+
($probabilitas[6][$nth]*log($probabilitas[6][$nth]))
));
}
}
}
showb(${"entz$nth"});
推荐答案
您可以在这样的for循环中生成变量名。
只需更改 $ how_many_i_want 的值。
You can generate variable names in for loops like this.
Just change the value of $how_many_i_want.
$how_many_i_want = 3;
for($x=0;$x<$how_many_i_want;$x++){
generate_entropy($x);
}
function generate_entropy($nth){
$kriteria = ['C1','C2','C3','C4','C5','C6'];
$alternatif = ['ALT1','ALT2','ALT','ALT4','ALT5','ALT6','ALT7'];
${"nEntropy$nth"} = array();
for ($i=0;$i<count($kriteria);$i++){
for ($j=0;$j<count($alternatif);$j++){
${"nEntropy$nth"}[$i] = (((-1)/log(7)) *(
($probabilitas[0][$nth]*log($probabilitas[0][$nth]))+
($probabilitas[1][$nth]*log($probabilitas[1][$nth]))+
($probabilitas[2][$nth]*log($probabilitas[2][$nth]))+
($probabilitas[3][$nth]*log($probabilitas[3][$nth]))+
($probabilitas[4][$nth]*log($probabilitas[4][$nth]))+
($probabilitas[5][$nth]*log($probabilitas[5][$nth]))+
($probabilitas[6][$nth]*log($probabilitas[6][$nth]))
));
}
}
showb(${"nEntropy$nth"});
}
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