Define your matrix as an array or arrays:

```

var matrix = [

[235, 235, 235, 235, 235, 235, 235, 235, 235, 235, 235], //0

[881, 235, 235, 235, 235, 235, 235, 235, 235, 235, 235], //1

// ...2 through 39...

[881, 851.5, 833.57, 816.88, 800.73, 784.91, 769.29, 753.82, 738.46, 723.18, 707.07] //40

]

```

Then access a value by row and column index:

```

var val = matrix[30][2]; //val = 819.52

```

---

Thank you so much for your answer. Maybe you can help me with one more thing. I can't make it work together with embedded data. I need the column to be a value which is an embedded datapoint ${e://Field/Count}, and the row to be ${e://Field/CountQ}. And then the resulting value should be added as an embedded data "Threshold" again. Can you show me what the Code would look like?

Best



var matrix = [

[235, 235, 235, 235, 235, 235, 235, 235, 235, 235, 235],//0

[881, 235, 235, 235, 235, 235, 235, 235, 235, 235, 235],//1

[881, 558, 235, 235, 235, 235, 235, 235, 235, 235, 235],

[881, 638, 477, 235, 235, 235, 235, 235, 235, 235, 235],

[881, 684, 558, 431, 235, 235, 235, 235, 235, 235, 235],

[881, 714, 608, 507, 401, 235, 235, 235, 235, 235, 235],

[881, 735, 644, 558, 471, 380, 235, 235, 235, 235, 235],

[881, 752, 671, 595, 520, 444, 363, 235, 235, 235, 235],

[881, 764, 692, 624, 558, 491, 423, 351, 235, 235, 235],

[881, 775, 709, 648, 587, 528, 467, 406, 340, 235, 235],

[881, 783, 723, 667, 612, 558, 503, 448, 392, 332, 235],//10

[881, 791, 735, 683, 632, 582, 533, 483, 432, 380, 324],

[881, 797, 745, 697, 650, 604, 558, 511, 465, 418, 370],

[881, 802, 754, 709, 665, 622, 579, 536, 493, 450, 406],

[881, 807, 762, 719, 678, 638, 597, 558, 518, 477, 437],

[881, 811, 768, 728, 690, 652, 614, 576, 539, 501, 463],

[881, 815, 774, 737, 700, 664, 628, 593, 558, 522, 487],

[881, 818, 780, 744, 709, 675, 641, 608, 574, 541, 507],

[881, 821, 785, 751, 717, 685, 653, 621, 589, 558, 526],

[881, 824, 789, 756, 725, 694, 663, 633, 603, 573, 542],

[881, 826, 793, 762, 732, 702, 673, 644, 615, 586, 558],//20

[881, 829, 797, 767, 738, 710, 682, 654, 626, 599, 571],

[881, 831, 800, 771, 744, 717, 690, 663, 637, 610, 584],

[881, 833, 803, 776, 749, 723, 697, 671, 646, 621, 595],

[881, 834, 806, 780, 754, 729, 704, 679, 655, 630, 606],

[881, 836, 809, 783, 758, 734, 710, 686, 663, 639, 616],

[881, 838, 811, 786, 763, 739, 716, 693, 670, 648, 625],

[881, 839, 813, 790, 767, 744, 722, 699, 677, 655, 634],

[881, 840, 816, 793, 770, 748, 727, 705, 684, 663, 642],

[881, 842, 818, 795, 774, 752, 731, 711, 690, 670, 649],

[881, 843, 820, 798, 777, 756, 736, 716, 696, 676, 656],//30

[881, 844, 821, 800, 780, 760, 740, 721, 701, 682, 663],

[881, 845, 823, 803, 783, 763, 744, 725, 706, 688, 669],

[881, 846, 825, 805, 785, 767, 748, 729, 711, 693, 675],

[881, 847, 826, 807, 788, 770, 751, 733, 716, 698, 680],

[881, 848, 827, 809, 790, 772, 755, 737, 720, 703, 685],

[881, 849, 829, 810, 793, 775, 758, 741, 724, 707, 690],

[881, 849, 830, 812, 795, 778, 761, 744, 728, 711, 695],

[881, 850, 831, 814, 797, 780, 764, 748, 732, 716, 700],

[881, 851, 832, 815, 799, 783, 767, 751, 735, 719, 704],

[881, 851, 834, 817, 801, 785, 769, 754, 738, 723, 708],//40

]

---

> @liss_SK said:

> Thank you so much for your answer. Maybe you can help me with one more thing. I can't make it work together with embedded data. I need the column to be a value which is an embedded datapoint ${e://Field/Count}, and the row to be ${e://Field/CountQ}. And then the resulting value should be added as an embedded data "Threshold" again. Can you show me what the Code would look like?

```

var threshold = matrix[parseInt("${e://Field/CountQ}")][parseInt("${e://Field/Count}"];

Qualtrics.SurveyEngine.setEmbeddedData("Threshold", threshold);

```

---