Wikiversity:Help desk/archives/May 2008

Regression analysis
I would like to know how to get a formula or group of formulas from a set of numbers. From analyzing the data, I know that I will need a formula for the first several numbers, another formula for the odd other numbers, and another formula for the even other numbers. I think regression analysis would help but I can't seem to find a calculator or computer program that will do modulus piecewise formulaic regression when I don't even know where to start. Here are the numbers:

Set 1 x--y--To next x value 2--15--+37 3--52--+70 4--122+115 5--237+169 6--406+231 7--637+305 8--942+384 9--1326--+474 101800--+569 112369--+672 123041--+781 133822--+897 144719--+1018 155737--+1144 166881--+1274 178155--+1409 189564--+1547 1911111+1689 2012800+1832 2114632+1978 2216610+2127 2318737+2275 2421012+2425 2523437+2575 2626012+2725 2728737+2873 2831610+3022 2934632+3168 3037800+3311 3141111+3453 3244564+3591 3348155+3726 3451881+3856 3555737+3982 3659719+4103 3763822+4219 3868041+4328 3972369+4431 4076800+4526 4181326+4616 4285942+4695 4390637+4769 4495406+4831 45100273--+4885 46105122--+4930 47110052--+4963 48115015--+4986 49120001--+4999 50125000--+6324 51131324--+6471 52137795--+6615 53144410--+6755 54151165--+6891 55158056--+7023 56165079--+7150 57172229--+7274 58179503--+7391 59186894--+7506 60194400--+7613 61202013--+7715 62209728--+7812 63217540--+7903 64225443--+7988 65233431--+8065 66241496--+8137 67249633--+8201 68257834--+9572 69267406--+9052 70276458--+9870 71286328--+10030 72296358--+9409 73305767--+10307 74316074--+10457 75326531--+9724 76336255--+10710 77346965--+10847 78357812--+9995 79367807--+11073 80378880--+11197 81390077--+10216 82400293--+11393 83411686--+11504 84423190--+10382 85433572--+11667 86445239--+11762 87457001--+10488 88467489--+11889 89479378--+11968 90491346--+10532 91501878--+12056 92513934--+12115 93526049--+10508 94536557--+12163 95548720--+12202 96560922--+10411 97571333--+12206 98583539--+8343 99591882--+8118 100--600000

Set 2 x--y-To next x value 1--1--+3 2--4--+9 3--13+19 4--32+33 5--65+47 6--112--+66 7--178--+98 8--276--+117 9--393--+147 10540--+205 11745--+222 12967--+263 131230+361 141591+366 151957+500 162457+589 173046+686 183732+794 194526+914 205440+1042 216482+1184 227666+1337 239003+1503 2410506--+1681 2512187--+1873 2614060--+2080 2716140--+2299 2818438--+2535 2920974--+2786 3023760--+3051 3126811--+3335 3230146--+3634 3333780--+3951 3437731--+4286 3542017--+4639 3646656--+3997 3750653--+5316 3855969--+4536 3960505--+6055 4066560--+5117 4171677--+6856 4278533--+5744 4384277--+7721 4491998--+6417 4598415--+8654 46107069+7136 47114205+9658 48123863+7903 49131766+10734 50142500+8722 51151222+11883 52163105+9592 53172697+13110 54185807+10515 55196322+14417 56210739+11492 57222231+15805 58238036+12526 59250562+17278 60267840+13616 61281456+18837 62300293+14766 63315059+20485 64335544+15976 65351520+22224 66373744+17247 67390991+25059 68415050+18581 69433631+25989 70459620+19980 71479600+28017 72507617+21446 73529063+30146 74559209+22978 75582187+32379 76614566+24580 77639146+34717 78673863+26252 79700115+37165 80737280+27996 81765275+39722 82804997+29812 83834809+42392 84877201+31704 85908905+45179 86954084+33670 87987754+48083 881035837--+35715 891071552--+51108 901122660--+37839 911160499--+54254 921214753--+40043 931254796--+57526 941312322--+42330 951354652--+60925 961415577--+44699 971460276--+64455 981524731--+47153 991571884--+68116 100--1640000

I was not able to make a table. Someone please make a table from this data.


 * For the syntax of wikitables, see meta:help:table. For the dynamics, see meta:template:for, especially the examples.  We can try to make it work if it gets stuck.  Hillgentleman|Talk 17:51, 3 May 2008 (UTC)

Four point probe method
what is Four point probe method in semi conductor resistivity measurement,, Erkan Yilmaz uses the Wikiversity:Chat (try) PS: Tag a learning project with completion status !! 17:06, 25 May 2008 (UTC)


 * See here: . StuRat 23:01, 25 May 2008 (UTC)