matrix interplation, increasing matrix elements 13 to 50

I want to increase my matrix 13 rows to 50 rows with interpolation but not linear type. Could you help me?

0.0 0.0 0.0 0.0 0.0 0.0890 0.2860 0.4380

0.0177 0.0648 0.0888 0.1070 0.1640 0.3680 0.5720 0.7040

0.0594 0.1778 0.2445 0.3140 0.4250 0.6140 0.7650 0.8540

0.2652 0.4723 0.6038 0.7260 0.8250 0.8970 0.9500 0.9820

0.5436 0.7547 0.8852 0.9570 0.9800 0.9910 0.9980 1.0000

0.7409 0.9056 0.9870 1.0000 1.0000 1.0000 1.0000 1.0000

0.7710 0.9260 0.9980 1.0000 1.0000 1.0000 1.0000 1.0000

0.7695 0.9260 0.9980 1.0000 1.0000 1.0000 1.0000 1.0000

0.6399 0.8297 0.9401 0.9710 0.9800 0.9850 0.9900 0.9920

0.3369 0.5788 0.7226 0.7780 0.8020 0.8270 0.8510 0.8770

0.0771 0.2463 0.3493 0.3890 0.4070 0.4300 0.4720 0.5360

0.0200 0.1019 0.1577 0.1770 0.1840 0.1940 0.2290 0.2990

0.0 0.0 0.0 0.0 0.0 0.0 0.0200 0.0510

Answer 1

[John D'Errico]

help interp2

Answer 2

[DGM]

Your matrix does not have 13 columns. it has 8 columns.

Decide whether you want to interpolate on rows or columns.

Decide what interplation type you want.

This is an example

A = [0.0 0.0 0.0 0.0 0.0 0.0890 0.2860 0.4380;
    0.0177 0.0648 0.0888 0.1070 0.1640 0.3680 0.5720 0.7040;
    0.0594 0.1778 0.2445 0.3140 0.4250 0.6140 0.7650 0.8540;
    0.2652 0.4723 0.6038 0.7260 0.8250 0.8970 0.9500 0.9820;
    0.5436 0.7547 0.8852 0.9570 0.9800 0.9910 0.9980 1.0000;
    0.7409 0.9056 0.9870 1.0000 1.0000 1.0000 1.0000 1.0000;
    0.7710 0.9260 0.9980 1.0000 1.0000 1.0000 1.0000 1.0000;
    0.7695 0.9260 0.9980 1.0000 1.0000 1.0000 1.0000 1.0000;
    0.6399 0.8297 0.9401 0.9710 0.9800 0.9850 0.9900 0.9920;
    0.3369 0.5788 0.7226 0.7780 0.8020 0.8270 0.8510 0.8770;
    0.0771 0.2463 0.3493 0.3890 0.4070 0.4300 0.4720 0.5360;
    0.0200 0.1019 0.1577 0.1770 0.1840 0.1940 0.2290 0.2990;
    0.0 0.0 0.0 0.0 0.0 0.0 0.0200 0.0510];

w = size(A,2);
B = interp1(1:w,A.',linspace(1,w,50),'cubic').'

B = 13×50

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -0.0008 -0.0026 -0.0047 -0.0062 -0.0065 -0.0047 0 0.0071 0.0177 0.0258 0.0335 0.0407 0.0474 0.0537 0.0595 0.0648 0.0695 0.0735 0.0770 0.0801 0.0830 0.0859 0.0888 0.0914 0.0933 0.0950 0.0968 0.0991 0.1024 0.1070 0.1118 0.1162 0.1210 0.1272 0.1359 0.1478 0.1640 0.1854 0.0594 0.0795 0.0985 0.1165 0.1334 0.1492 0.1641 0.1778 0.1900 0.2005 0.2099 0.2184 0.2267 0.2353 0.2445 0.2539 0.2629 0.2719 0.2812 0.2910 0.3019 0.3140 0.3270 0.3404 0.3546 0.3698 0.3864 0.4047 0.4250 0.4482 0.2652 0.2994 0.3321 0.3632 0.3928 0.4208 0.4473 0.4723 0.4951 0.5157 0.5344 0.5521 0.5691 0.5862 0.6038 0.6219 0.6401 0.6580 0.6757 0.6930 0.7098 0.7260 0.7416 0.7568 0.7715 0.7857 0.7994 0.8125 0.8250 0.8369 0.5436 0.5787 0.6121 0.6439 0.6741 0.7026 0.7295 0.7547 0.7781 0.7996 0.8193 0.8376 0.8545 0.8703 0.8852 0.8990 0.9114 0.9226 0.9327 0.9418 0.9498 0.9570 0.9630 0.9675 0.9709 0.9735 0.9757 0.9778 0.9800 0.9822 0.7409 0.7695 0.7965 0.8217 0.8452 0.8670 0.8872 0.9056 0.9222 0.9369 0.9499 0.9613 0.9712 0.9797 0.9870 0.9926 0.9961 0.9980 0.9989 0.9992 0.9994 1.0000 1.0007 1.0009 1.0009 1.0007 1.0004 1.0001 1.0000 1.0000 0.7710 0.7982 0.8238 0.8476 0.8697 0.8902 0.9089 0.9260 0.9413 0.9547 0.9663 0.9764 0.9850 0.9921 0.9980 1.0020 1.0037 1.0039 1.0030 1.0016 1.0004 1.0000 1.0001 1.0001 1.0001 1.0001 1.0001 1.0000 1.0000 1.0000 0.7695 0.7970 0.8228 0.8469 0.8693 0.8899 0.9088 0.9260 0.9413 0.9548 0.9664 0.9765 0.9850 0.9921 0.9980 1.0020 1.0037 1.0039 1.0030 1.0016 1.0004 1.0000 1.0001 1.0001 1.0001 1.0001 1.0001 1.0000 1.0000 1.0000 0.6399 0.6719 0.7022 0.7310 0.7581 0.7836 0.8074 0.8297 0.8503 0.8693 0.8867 0.9025 0.9167 0.9292 0.9401 0.9489 0.9554 0.9601 0.9635 0.9661 0.9684 0.9710 0.9735 0.9753 0.9766 0.9776 0.9784 0.9791 0.9800 0.9809 0.3369 0.3775 0.4160 0.4526 0.4871 0.5197 0.5502 0.5788 0.6053 0.6296 0.6519 0.6723 0.6908 0.7076 0.7226 0.7354 0.7458 0.7542 0.7611 0.7670 0.7725 0.7780 0.7831 0.7871 0.7904 0.7933 0.7960 0.7988 0.8020 0.8055

[Salim Güven]

I'm sorry, that was must be 13 rows to 50. Can you do this for me. Thanx

[DGM]

A = [0.0 0.0 0.0 0.0 0.0 0.0890 0.2860 0.4380;
    0.0177 0.0648 0.0888 0.1070 0.1640 0.3680 0.5720 0.7040;
    0.0594 0.1778 0.2445 0.3140 0.4250 0.6140 0.7650 0.8540;
    0.2652 0.4723 0.6038 0.7260 0.8250 0.8970 0.9500 0.9820;
    0.5436 0.7547 0.8852 0.9570 0.9800 0.9910 0.9980 1.0000;
    0.7409 0.9056 0.9870 1.0000 1.0000 1.0000 1.0000 1.0000;
    0.7710 0.9260 0.9980 1.0000 1.0000 1.0000 1.0000 1.0000;
    0.7695 0.9260 0.9980 1.0000 1.0000 1.0000 1.0000 1.0000;
    0.6399 0.8297 0.9401 0.9710 0.9800 0.9850 0.9900 0.9920;
    0.3369 0.5788 0.7226 0.7780 0.8020 0.8270 0.8510 0.8770;
    0.0771 0.2463 0.3493 0.3890 0.4070 0.4300 0.4720 0.5360;
    0.0200 0.1019 0.1577 0.1770 0.1840 0.1940 0.2290 0.2990;
    0.0 0.0 0.0 0.0 0.0 0.0 0.0200 0.0510];

w = size(A,1);
B = interp1(1:w,A,linspace(1,w,50),'cubic')

B = 50×8

0 0 0 0 0 0.0890 0.2860 0.4380 0.0021 0.0114 0.0156 0.0170 0.0312 0.1604 0.3646 0.5139 0.0057 0.0257 0.0351 0.0399 0.0682 0.2298 0.4377 0.5828 0.0107 0.0429 0.0587 0.0689 0.1110 0.2972 0.5052 0.6447 0.0171 0.0630 0.0863 0.1038 0.1597 0.3626 0.5671 0.6997 0.0222 0.0834 0.1153 0.1427 0.2133 0.4247 0.6218 0.7459 0.0261 0.1040 0.1456 0.1856 0.2720 0.4835 0.6692 0.7834 0.0348 0.1309 0.1832 0.2370 0.3375 0.5420 0.7132 0.8161 0.0546 0.1697 0.2343 0.3016 0.4117 0.6033 0.7573 0.8484 0.0896 0.2264 0.3060 0.3878 0.5017 0.6725 0.8055 0.8834