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 Topic  |
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ordinary_girl83
United Kingdom
1 Posts |
 Posted - 01/20/2010 : 11:51:59 AM
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Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:
Hi All
I try to fit the graph (as attached)by using 'Fit Multi-peaks' (Origin Pro 8). I just wondering, is it possible to improve the shape of the fitted curves (green line) to the shape that I draw (red line+symbol). I also try to fit it use Origin 6. I couldn't get the shape that I want, even after change the parameters. I really appreciate for your kind reply.
I paste the data in case anybody want to try to fit it.
1091.178 1489
1091.687 1394
1092.196 1466
1092.704 1369
1093.213 1490
1093.721 1397
1094.23 1505
1094.738 1390
1095.247 1493
1095.755 1397
1096.264 1525
1096.772 1420
1097.28 1564
1097.788 1470
1098.297 1545
1098.805 1464
1099.313 1567
1099.821 1494
1100.329 1617
1100.837 1518
1101.345 1655
1101.853 1555
1102.361 1644
1102.869 1582
1103.377 1674
1103.885 1591
1104.392 1710
1104.9 1589
1105.408 1726
1105.916 1655
1106.423 1769
1106.931 1707
1107.438 1778
1107.946 1711
1108.453 1821
1108.961 1727
1109.468 1857
1109.976 1707
1110.483 1858
1110.99 1794
1111.498 1910
1112.005 1844
1112.512 1975
1113.019 1867
1113.527 1991
1114.034 1937
1114.541 2040
1115.048 1973
1115.555 2107
1116.062 1988
1116.569 2130
1117.076 2040
1117.583 2133
1118.089 2105
1118.596 2171
1119.103 2136
1119.61 2256
1120.116 2195
1120.623 2301
1121.13 2223
1121.636 2367
1122.143 2290
1122.649 2423
1123.156 2367
1123.662 2474
1124.169 2420
1124.675 2541
1125.181 2455
1125.688 2573
1126.194 2538
1126.7 2633
1127.206 2590
1127.713 2717
1128.219 2648
1128.725 2776
1129.231 2693
1129.737 2798
1130.243 2773
1130.749 2905
1131.255 2822
1131.761 2967
1132.267 2908
1132.772 3061
1133.278 2944
1133.784 3090
1134.29 3054
1134.795 3158
1135.301 3142
1135.807 3280
1136.312 3209
1136.818 3329
1137.323 3291
1137.829 3379
1138.334 3346
1138.84 3494
1139.345 3436
1139.85 3551
1140.355 3492
1140.861 3649
1141.366 3580
1141.871 3680
1142.376 3639
1142.881 3761
1143.387 3718
1143.892 3874
1144.397 3808
1144.902 3928
1145.406 3934
1145.911 4036
1146.416 4030
1146.921 4146
1147.426 4154
1147.931 4319
1148.435 4291
1148.94 4432
1149.445 4416
1149.949 4548
1150.454 4576
1150.959 4728
1151.463 4690
1151.968 4836
1152.472 4849
1152.976 4999
1153.481 4999
1153.985 5130
1154.489 5141
1154.994 5320
1155.498 5293
1156.002 5439
1156.506 5439
1157.01 5615
1157.515 5521
1158.019 5731
1158.523 5742
1159.027 5919
1159.531 5829
1160.034 6049
1160.538 6034
1161.042 6202
1161.546 6173
1162.05 6317
1162.554 6299
1163.057 6485
1163.561 6462
1164.065 6652
1164.568 6591
1165.072 6794
1165.575 6783
1166.079 6974
1166.582 6933
1167.086 7068
1167.589 7107
1168.092 7268
1168.596 7210
1169.099 7396
1169.602 7424
1170.106 7634
1170.609 7585
1171.112 7791
1171.615 7781
1172.118 7924
1172.621 7923
1173.124 8086
1173.627 8099
1174.13 8273
1174.633 8258
1175.136 8463
1175.639 8453
1176.141 8646
1176.644 8583
1177.147 8806
1177.65 8803
1178.152 9005
1178.655 8988
1179.157 9194
1179.66 9151
1180.163 9359
1180.665 9339
1181.167 9543
1181.67 9523
1182.172 9742
1182.675 9669
1183.177 9892
1183.679 9879
1184.181 10114
1184.684 10080
1185.186 10235
1185.688 10272
1186.19 10514
1186.692 10416
1187.194 10707
1187.696 10659
1188.198 10925
1188.7 10822
1189.202 11066
1189.704 11041
1190.205 11325
1190.707 11258
1191.209 11566
1191.711 11450
1192.212 11752
1192.714 11694
1193.216 12017
1193.717 11874
1194.219 12231
1194.72 12161
1195.222 12499
1195.723 12371
1196.224 12687
1196.726 12541
1197.227 12931
1197.728 12739
1198.23 13134
1198.731 13002
1199.232 13395
1199.733 13248
1200.234 13614
1200.735 13422
1201.236 13839
1201.737 13668
1202.238 14013
1202.739 13882
1203.24 14215
1203.741 14073
1204.242 14442
1204.743 14293
1205.243 14652
1205.744 14516
1206.245 14857
1206.746 14662
1207.246 15056
1207.747 14829
1208.247 15231
1208.748 15085
1209.248 15386
1209.749 15249
1210.249 15622
1210.749 15378
1211.25 15754
1211.75 15553
1212.25 15918
1212.751 15660
1213.251 15997
1213.751 15788
1214.251 16178
1214.751 15861
1215.251 16275
1215.751 15972
1216.251 16432
1216.751 16140
1217.251 16528
1217.751 16190
1218.251 16594
1218.751 16347
1219.25 16953
1219.75 16486
1220.25 16696
1220.75 16520
1221.249 16769
1221.749 16314
1222.248 16774
1222.748 16368
1223.247 16845
1223.747 16408
1224.246 16843
1224.746 16394
1225.245 16823
1225.744 16337
1226.244 16799
1226.743 16298
1227.242 16767
1227.741 16294
1228.24 16673
1228.739 16193
1229.238 16647
1229.738 16159
1230.237 16494
1230.735 16042
1231.234 16430
1231.733 15893
1232.232 16199
1232.731 15748
1233.23 16069
1233.729 15619
1234.227 15926
1234.726 15490
1235.225 15728
1235.723 15259
1236.222 15617
1236.72 15104
1237.219 15459
1237.717 14997
1238.216 15276
1238.714 14901
1239.213 15171
1239.711 14809
1240.209 15038
1240.707 14698
1241.206 14968
1241.704 14608
1242.202 14828
1242.7 14510
1243.198 14826
1243.696 14433
1244.194 14677
1244.692 14409
1245.19 14679
1245.688 14322
1246.186 14494
1246.684 14288
1247.182 14523
1247.679 14249
1248.177 14489
1248.675 14115
1249.172 14345
1249.67 14143
1250.168 14348
1250.665 14077
1251.163 14269
1251.66 13958
1252.158 14240
1252.655 14017
1253.153 14195
1253.65 13930
1254.147 14135
1254.644 13871
1255.142 14054
1255.639 13830
1256.136 13963
1256.633 13785
1257.13 13975
1257.627 13720
1258.124 13800
1258.621 13599
1259.118 13721
1259.615 13479
1260.112 13599
1260.609 13398
1261.106 13449
1261.603 13300
1262.099 13406
1262.596 13187
1263.093 13258
1263.589 13057
1264.086 13141
1264.583 12876
1265.079 12950
1265.576 12760
1266.072 12813
1266.569 12588
1267.065 12660
1267.561 12420
1268.058 12508
1268.554 12310
1269.05 12328
1269.546 12163
1270.043 12193
1270.539 11995
1271.035 12012
1271.531 11830
1272.027 11850
1272.523 11675
1273.019 11668
1273.515 11466
1274.011 11482
1274.507 11304
1275.003 11364
1275.498 11192
1275.994 11142
1276.49 10984
1276.986 10911
1277.481 10774
1277.977 10809
1278.472 10599
1278.968 10567
1279.464 10370
1279.959 10374
1280.454 10271
1280.95 10205
1281.445 10059
1281.941 10016
1282.436 9881
1282.931 9807
1283.426 9687
1283.922 9667
1284.417 9511
1284.912 9458
1285.407 9340
1285.902 9284
1286.397 9143
1286.892 9103
1287.387 8981
1287.882 8955
1288.377 8834
1288.872 8763
1289.367 8669
1289.861 8611
1290.356 8526
1290.851 8445
1291.345 8301
1291.84 8290
1292.335 8187
1292.829 8136
1293.324 7981
1293.818 7938
1294.313 7847
1294.807 7754
1295.302 7634
1295.796 7573
1296.29 7474
1296.785 7402
1297.279 7287
1297.773 7260
1298.267 7141
1298.761 7059
1299.256 6989
1299.75 6920
1300.244 6857
1300.738 6754
1301.232 6684
1301.726 6621
1302.219 6504
1302.713 6435
1303.207 6375
1303.701 6309
1304.195 6172
1304.688 6173
1305.182 6029
1305.676 5964
1306.169 5907
1306.663 5818
1307.157 5723
1307.65 5700
1308.144 5572
1308.637 5502
1309.13 5453
1309.624 5378
1310.117 5281
1310.61 5221
1311.104 5162
1311.597 5100
1312.09 5062
1312.583 4969
1313.076 4876
1313.57 4807
1314.063 4748
1314.556 4678
1315.049 4580
1315.542 4523
1316.034 4461
1316.527 4405
1317.02 4329
1317.513 4254
1318.006 4209
1318.499 4164
1318.991 4089
1319.484 3999
1319.977 3912
1320.469 3862
1320.962 3849
1321.454 3778
1321.947 3725
1322.439 3670
1322.932 3635
1323.424 3576
1323.916 3501
1324.409 3437
1324.901 3420
1325.393 3335
1325.885 3294
1326.378 3248
1326.87 3229
1327.362 3130
1327.854 3110
1328.346 3086
1328.838 3021
1329.33 2958
1329.822 2918
1330.314 2866
1330.806 2828
1331.298 2805
1331.789 2751
1332.281 2662
1332.773 2632
1333.264 2618
1333.756 2581
1334.248 2549
1334.739 2481
1335.231 2448
1335.722 2440
1336.214 2356
1336.705 2331
1337.197 2265
1337.688 2255
1338.179 2211
1338.671 2166
1339.162 2134
1339.653 2123
1340.144 2096
1340.636 2071
1341.127 2025
1341.618 1978
1342.109 1950
1342.6 1910
1343.091 1920
1343.582 1873
1344.073 1857
1344.564 1792
1345.054 1775
1345.545 1743
1346.036 1743
1346.527 1741
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easwar
USA
1964 Posts |
Posted - 01/20/2010 : 12:10:00 PM
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Hi,
The Fit Multiple Peaks tool does a quick fit of the data and does not have options to specify bounds, constraints etc. Looks like what you want to do is specify that your centers be restricted to some specific range of x values, which is basically applying bounds on the centers while fitting. This can be done with the NLFit tool using Replicas or using the Peak Analyzer for peak fitting (available in Pro, you have Pro).
For information on fitting with replicas, see the Origin help file topic:
http://originlab.com/www/helponline/Origin/en/UserGuide/Fitting_Multiple_Peaks_with_Replicas.html
Once you set up number of replicas and function, you can go to Bounds tab and place bounds on the centers to limit them to the range you want.
For fitting with peak analyzer, you can view this video tutorial:
http://originlab.com/index.aspx?s=9&lm=395&pid=1547
Easwar
OriginLab |
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Likantropo88
Spain
2 Posts |
Posted - 05/16/2013 : 06:00:31 AM
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| I have your exact same problem. How did you do it in the end? I can't manage to find the way around it and the answer from the origin staff doesn't help me at all. Is there a simple way to do it? THanks in advance! |
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snowli
USA
1379 Posts |
Posted - 05/16/2013 : 1:55:10 PM
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Here are detailed steps:
1. With the plot active, choose Analysis: Peaks and Baseline: Multiple Peak Fit... menu.
2. Choose the Peak function you want and click OK.
--> Get Points dialog opens.
3. You can double click the peak center positions in the graph to pick peaks. Double click twice will pick two peaks.
4. Click Open NLFit button in Get Points dialog.
--> NLFit dialog opens and it will allow you to do more settings.
To get fit result like yours, we need to set upper limit of the peak width
5. Go to Bounds tab.
6. Double click in the cell next to w to see <=. Then enter e.g. 50 as Upper Bounds.
7. Do the same for w_2.
8. Click Fit. The fit looks better now.
9. If you are not satistified, in graph window, you can click green lock and choose Change Parameters.
10. You can go to Parameters tab. You can fix some parameter values. And share them between different peaks.
E.g. check the Fixed checkbox for xc and xc_2. And enter the peak center you want the peaks to be.
Or you can go to Bounds tab. Set the lower and upper limit of the xc and xc_2, or Area, etc.
11. Click OK to update the fit.
12. BTW, in NLFit, you can click 1-iter to fit step by step and once you are satisfied u can click Done instead of Fit button to get wparameters you got so far.
Hope it helps. Any questions, don't hesitate to ask us.
Thanks, Snow Li
OriginLab Corp. |
Edited by - snowli on 05/16/2013 2:37:35 PM |
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Likantropo88
Spain
2 Posts |
Posted - 05/24/2013 : 06:25:00 AM
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| Thank you very much for your help. I will try this. |
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Topic |
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Fitting Gaussian multiple peaks