How to get cross section of 3 dimensional array c# -


say have 3-dimensional array in c#

int space[width, height, depth];

and implement method

public int[,] getcrosssection(int position, int dimension)

where 'position' point along 'dimension' specified extract slice. important not use fact dealing 3 dimensions, in examples below fix them adding if statements , assume matrix not grow beyond 3 dimensions.

my first attempt (commented problem areas):

public int[,] getcrosssection(int position, int dimension) {     int[] dimensioniterationinterval = new int[] { width, height, depth };     var dims = new list<int>(dimensioniterationinterval);     dims.removeat(dimension);     dimensioniterationinterval = dims.toarray();       int[,] crosssection = new int[dimensioniterationinterval[0], dimensioniterationinterval[1]];     int[] itr = new int[2];     (itr[0] = 0; itr[0] < dimensioniterationinterval[0]; itr[0]++)     {         (itr[1] = 0; itr[1] < dimensioniterationinterval[1]; itr[1]++)         {            crosssection[itr[0], itr[1]] = space[?,?,?]; //problem         }      } }

and second attempt, equally futile:

public int[,] getcrosssection(int position, int dimension) {     int[,] dimensioniterationinterval = new int[,] { { 0, width }, { 0, height }, { 0, depth } };     dimensioniterationinterval[dimension, 0] = position;     dimensioniterationinterval[dimension, 1] = position + 1;      int[,] crosssection = new int[?,?]; //problem     (int x = dimensioniterationinterval[0, 0]; x < dimensioniterationinterval[0, 1]; x++)      {        (int y = dimensioniterationinterval[1, 0]; y< dimensioniterationinterval[1, 1]; y++)         {           (int z = dimensioniterationinterval[2, 0]; z < dimensioniterationinterval[2, 1]; z++)           {               crosssection[?, ?] = space[x, y, z]; // problem           }          }       }  }

both attemps run dead ends. how solve it? it's ok have fixed iteration loops number of dimensions of space[,,]. if number of dimensions grow managable. clever/limited if statments work, not excessive ifs each dimension.

quick draft:

    static int[,] getslice(int[,,] source, int dimension, int position)     {         int l1 = 0, l2 = 0;         if (dimension == 0)         {             l1 = source.getlength(1);             l2 = source.getlength(2);         }         else if (dimension == 1)         {             l1 = source.getlength(0);             l2 = source.getlength(2);         }         else if (dimension == 2)         {             l1 = source.getlength(0);             l2 = source.getlength(1);         }          var result = new int[l1, l2];          var s0 = dimension == 0 ? position : 0;         var s1 = dimension == 1 ? position : 0;         var s2 = dimension == 2 ? position : 0;          var m0 = dimension == 0 ? position + 1 : source.getlength(0);         var m1 = dimension == 1 ? position + 1 : source.getlength(1);         var m2 = dimension == 2 ? position + 1 : source.getlength(2);          (var i0 = s0; i0 < m0; i0++)         (var i1 = s1; i1 < m1; i1++)         (var i2 = s2; i2 < m2; i2++)         {             int x = 0, y = 0;             if (dimension == 0)             {                 x = i1;                 y = i2;             }             else if (dimension == 1)             {                 x = i0;                 y = i2;             }             else if (dimension == 2)             {                 x = i0;                 y = i1;             }              result[x, y] = source[i0, i1, i2];         }          return result;     }

it can generalised number of dimensions (and make code smaller , simpler).


Comments

Post a Comment

Popular posts from this blog

Command prompt result in label. Python 2.7 -

i want put result(output) of shell command label. command works, label shows "0", however, in command prompt, result shown correctly, need showed in label. doing ubuntu. myg1 = button(root, text="rodyti informacija", command=lambda: gauti()) myg1.pack(side=bottom) def gauti(): imti = tekstas.get("1.0", "end-1c") info = subprocess.call("id '{imti}' ".format(imti=imti), shell=true) w = label(root, text= info) w.pack(side = bottom) subprocess.call() returns exit code of process created (in case 0 success). if want text output of process, should instead call subprocess.check_output() .
Read more

javascript - How do I use URL parameters to change link href on page? -

i change href value of link using url parameters. example: default <a id="dlink" href="link-1">link</a> but, when user goes https://url.com/?dlink=link-2 it swaps out link new link <a id="dlink" href="link-2">link</a> first need value url. if you're not using javascript framework can create function using jquery. please check get url parameter jquery or how query string values in js it. after that, element "a" id , set value there. $("#dlink").attr("href", hreffromparam);
Read more

amazon web services - AWS Route53 Trying To Get Site To Resolve To www -

so have domain nameservers pointed aws route 53. site hosted on ec2 instance , reachable resolves site.com, if input www.site.com. i'm curious how site resolve www.site.com. have under route53 domains hosted zone 2 additional record sets outside of ns , soa: a site.com ec2 elastic ip cname www.site.com ec2 public dns i can reach site using both site.com , www.site.com, resolve site.com. there way make if enter either, resolves www.site.com? at first, both should record set. a site.com ec2 elastic ip www.site.com ec2 elastic ip and need redirect setting in web server (nginx, apache, ..) following. (source: how redirect www non-www nginx on centos 7 ) redirect non-www www if want redirect users plain, non-www domain www domain, add server block: server { server_name example.com; return 301 $scheme://www.example.com$request_uri; } save , exit. configures nginx redirect requests "example.com" "www.example.com". not...
Read more