How to interpolate column and row?

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Anita Fitriani
Anita Fitriani el 20 de Mzo. de 2020
Comentada: Aditya Gandhi el 1 de Jul. de 2021
How can I get the value below the 'Year' row, if my G-value is 2.5 and the year is 4.17 and 4.58?
I mean, I have to interpolate the G-values between 2.4 and 2.6, also I have to interpolate the Year between 2 and 5.
Thanks before.

Respuesta aceptada

Stephen23
Stephen23 el 20 de Mzo. de 2020
Editada: Stephen23 el 23 de Mzo. de 2020
Use interp2, e.g.:
>> Y = [1.0101,1.25,2,5,10,25,50,100];
>> G = [3,2.8,2.6,2.4,2.2,2,1.8,1.6,1.4,1.2,1,0.8,0.6,0.4,0.2,0,-0.2,-0.4,-0.6,-0.8,-1,-1.2,-1.4,-1.6,-1.8,-2,-2.2,-2.4,-2.6,-2.8,-3];
>> M = [-0.667,-0.636,-0.396,0.42,1.18,2.278,3.152,4.051;-0.714,-0.666,-0.384,0.46,1.21,2.275,3.114,3.973;-0.769,-0.696,-0.368,0.499,1.238,2.267,3.071,2.889;-0.832,-0.725,-0.351,0.537,1.262,2.256,3.023,3.8;-0.905,-0.752,-0.33,0.574,1.284,2.24,2.97,3.705;-0.99,-0.777,-0.307,0.609,1.302,2.219,2.192,3.605;-1.087,-0.799,-0.282,0.643,1.318,2.193,2.848,3.499;-1.197,-0.817,-0.254,0.675,1.329,2.163,2.78,3.388;-1.318,-0.832,-0.225,0.705,1.337,2.128,2.706,3.271;-1.449,-0.844,-0.195,0.732,1.34,2.087,2.626,3.149;-1.588,-0.852,-0.164,0.758,1.34,2.043,2.542,3.022;-1.733,-0.856,-0.132,0.78,1.336,1.993,2.453,2.891;-1.88,-0.857,-0.099,0.8,1.328,1.939,2.359,2.755;-2.029,-0.855,-0.066,0.816,1.317,1.88,2.261,2.615;-2.178,-0.85,-0.033,0.83,1.301,1.818,2.159,2.472;-2.326,-0.842,0,0.842,1.282,1.751,2.051,2.326;-2.472,-0.83,0.033,0.85,1.258,1.68,1.945,2.178;-2.271,-0.816,0.066,0.855,1.231,1.606,1.834,2.029;-2.388,-0.8,0.099,0.857,1.2,1.528,1.72,1.88;-3.499,-0.78,0.132,0.856,1.166,1.448,1.606,1.733;-3.605,-0.758,0.164,0.852,1.128,1.366,1.492,1.588;-3.705,-0.732,0.195,0.844,1.086,1.282,1.379,1.449;-3.8,-0.705,0.225,0.832,1.041,1.198,1.27,1.318;-3.889,-0.675,0.254,0.817,0.994,1.116,1.166,1.197;-3.449,-0.643,0.282,0.799,0.945,1.035,1.069,1.087;-3.605,-0.609,0.307,0.777,0.895,0.959,0.98,0.99;-3.705,-0.574,0.33,0.752,0.844,0.888,0.9,0.905;-3.8,-0.537,0.351,0.725,0.795,0.823,0.83,0.832;-3.889,-0.49,0.368,0.696,0.747,0.764,0.768,0.769;-3.973,-0.469,0.384,0.666,0.702,0.712,0.714,0.714;-7.051,-0.42,0.396,0.636,0.66,0.666,0.666,0.667];
>> Yout = [4.17,4.58];
>> Gout = 2.5;
>> Mout = interp2(Y,G,M,Yout,Gout)
Mout =
0.27522 0.39515
And checking:
>> surf(Y,G,M)
>> hold on
>> plot3(Yout,[Gout,Gout],0.1+Mout,'*r')
>> view(-123,45)
  8 comentarios
Stephen23
Stephen23 el 1 de Jul. de 2021
@Aditya Gandhi: ask a new question in a new thread, including your example data.

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