Hello,

I used this input data:

0 0.0137686
0.01 0.0137668
0.02 0.013765
0.03 0.0137633
0.04 0.0137615
0.05 0.0137597
0.06 0.0137579
0.07 0.0137561
0.08 0.0137543
0.09 0.0137524
0.1 0.0137506
0.11 0.0137488
0.12 0.0137469
0.13 0.0137451
0.14 0.0137432
0.15 0.0137413
0.16 0.0137394
0.17 0.0137375
0.18 0.0137356
0.19 0.0137337
0.2 0.0137318
0.21 0.0137299
0.22 0.0137279
0.23 0.013726
0.24 0.013724
0.25 0.0137221
0.26 0.0137201
0.27 0.0137181
0.28 0.0137161
0.29 0.0137141
0.3 0.0137121
0.31 0.0137101
0.32 0.013708
0.33 0.013706
0.34 0.0137039
0.35 0.0137018
0.36 0.0136997
0.37 0.0136977
0.38 0.0136955
0.39 0.0136934
0.4 0.0136913
0.41 0.0136891
0.42 0.013687
0.43 0.0136848
0.44 0.0136826
0.45 0.0136804
0.46 0.0136782
0.47 0.013676
0.48 0.0136738
0.49 0.0136715
0.5 0.0136692
0.51 0.013667
0.52 0.0136647
0.53 0.0136623
0.54 0.01366
0.55 0.0136577
0.56 0.0136553
0.57 0.0136529
0.58 0.0136505
0.59 0.0136481
0.6 0.0136457
0.61 0.0136433
0.62 0.0136408
0.63 0.0136383
0.64 0.0136358
0.65 0.0136333
0.66 0.0136308
0.67 0.0136282
0.68 0.0136256
0.69 0.013623
0.7 0.0136204
0.71 0.0136178
0.72 0.0136151
0.73 0.0136124
0.74 0.0136097
0.75 0.013607
0.76 0.0136042
0.77 0.0136015
0.78 0.0135987
0.79 0.0135958
0.8 0.013593
0.81 0.0135901
0.82 0.0135872
0.83 0.0135843
0.84 0.0135813
0.85 0.0135784
0.86 0.0135754
0.87 0.0135723
0.88 0.0135692
0.89 0.0135661
0.9 0.013563
0.91 0.0135598
0.92 0.0135566
0.93 0.0135533
0.94 0.01355
0.95 0.0135466
0.96 0.0135431
0.97 0.0135396
0.98 0.0135358
0.99 0.013532
1 0.0135278
1.01 0.0135233
1.02 0.0135184
1.03 0.0135127
1.04 0.0135061
1.05 0.013498
1.06 0.0134879
1.07 0.0134747
1.08 0.0134571
1.09 0.0134331
1.1 0.0133997
1.11 0.0133524
1.12 0.0132848
1.13 0.0131877
1.14 0.013047
1.15 0.0128427
1.16 0.0125452
1.17 0.0121115
1.18 0.0114792
1.19 0.0105578
1.2 0.00921788
1.21 0.00727531
1.22 0.0044726
1.23 0

but i have this error message :

Error using interp1 at 184

There should at least two data points

Please helpe me

Thanks in advance