If I have the following data:
data={{68.029,0.0570654},{68.062,0.0571538},{68.095,0.0573135},{68.128,0.0573148},{68.161,0.0574761},{68.194,0.0576357},{68.227,0.0577004},{68.261,0.0574547},{68.293,0.0576841},{68.326,0.0576759},{68.359,0.0576677},{68.392,0.0577419},{68.426,0.0576339},{68.459,0.0577603},{68.492,0.0578867},{68.525,0.0580131},{68.558,0.0581791},{68.591,0.058209},{68.624,0.0583987},{68.657,0.0585884},{68.69,0.0587781},{68.723,0.0589489},{68.756,0.0589455},{68.788,0.0593332},{68.821,0.0594897},{68.855,0.0594118},{68.888,0.0597297},{68.921,0.0598878},{68.954,0.0600459},{68.987,0.0602039},{69.02,0.060362},{69.053,0.0605185},{69.086,0.0608349},{69.119,0.0609898},{69.152,0.0611463},{69.185,0.0613012},{69.218,0.0616191},{69.252,0.0615444},{69.285,0.0618623},{69.318,0.0620204},{69.351,0.0621785},{69.384,0.06246},{69.417,0.0625516},{69.45,0.0626448},{69.484,0.0625004},{69.517,0.0625919},{69.551,0.0625077},{69.584,0.0628557},{69.617,0.0630423},{69.65,0.0632304},{69.683,0.0634186},{69.716,0.0636083},{69.749,0.063798},{69.781,0.064219},{69.815,0.0641775},{69.848,0.0643672},{69.881,0.0647169},{69.914,0.0649034},{69.947,0.0650916},{69.981,0.0650469},{70.014,0.0652351},{70.048,0.065412},{70.08,0.0659248},{70.113,0.0662079},{70.146,0.0666526},{70.179,0.0669357},{70.211,0.0675735},{70.245,0.0677236},{70.278,0.0681065},{70.311,0.0683279},{70.345,0.0684795},{70.378,0.0689399},{70.41,0.0694242},{70.443,0.0696725},{70.476,0.0700807},{70.509,0.0703306},{70.542,0.0706581},{70.576,0.0709664},{70.609,0.0713477},{70.641,0.072117},{70.674,0.0724967},{70.707,0.0729983},{70.74,0.0733147},{70.773,0.0737894},{70.807,0.0738729},{70.84,0.0743492},{70.873,0.0748017},{70.905,0.0754776},{70.938,0.0759174},{70.971,0.0763589},{71.004,0.0768003},{71.037,0.0770851},{71.071,0.0772968},{71.104,0.077743},{71.136,0.0784236},{71.17,0.0787969},{71.202,0.0794364},{71.235,0.0798161},{71.268,0.0801958},{71.301,0.0807354},{71.335,0.0808791},{71.368,0.0813759},{71.401,0.081849},{71.434,0.0823206},{71.467,0.0827937},{71.5,0.0832652},{71.533,0.0837842},{71.566,0.084327},{71.6,0.0847952},{71.632,0.085574},{71.665,0.0862767},{71.698,0.0869382},{71.731,0.0874176},{71.764,0.0880569},{71.797,0.0885364},{71.831,0.0889381},{71.864,0.0895316},{71.897,0.0900997},{71.93,0.0906677},{71.962,0.0916349},{71.995,0.092203},{72.028,0.0929959},{72.061,0.0936669},{72.094,0.0944994},{72.128,0.0950927},{72.161,0.0959236},{72.194,0.0967117},{72.226,0.0977153},{72.259,0.0984781},{72.292,0.0992425},{72.326,0.0997677},{72.359,0.100592},{72.392,0.101612},{72.424,0.102709},{72.458,0.103492},{72.491,0.104351},{72.524,0.105329},{72.557,0.106281},{72.59,0.107233},{72.623,0.108186},{72.656,0.109137},{72.688,0.110454},{72.722,0.111212},{72.754,0.112434},{72.787,0.113425},{72.821,0.114023},{72.854,0.115609},{72.887,0.11701},{72.919,0.118166},{72.952,0.119087},{72.985,0.120647},{73.019,0.121519},{73.052,0.122638},{73.085,0.124236},{73.118,0.125355},{73.152,0.126241},{73.184,0.12771},{73.217,0.128761},{73.249,0.130048},{73.282,0.1311},{73.315,0.132311},{73.348,0.133561},{73.382,0.134444},{73.415,0.136361},{73.448,0.138117},{73.481,0.139392},{73.514,0.14127},{73.547,0.142484},{73.58,0.143859},{73.613,0.145075},{73.647,0.146214},{73.679,0.147801},{73.712,0.149138},{73.745,0.150314},{73.778,0.151652},{73.811,0.153147},{73.844,0.154569},{73.878,0.155968},{73.911,0.157598},{73.944,0.160028},{73.977,0.161818},{74.01,0.163267},{74.042,0.165097},{74.075,0.166852},{74.109,0.168215},{74.142,0.16981},{74.176,0.171334},{74.209,0.17341},{74.241,0.175559},{74.274,0.178596},{74.307,0.180671},{74.34,0.183791},{74.373,0.185997},{74.407,0.188137},{74.44,0.191785},{74.473,0.194151},{74.506,0.19644},{74.539,0.198997},{74.572,0.201552},{74.605,0.204268},{74.638,0.208585},{74.671,0.21142},{74.705,0.214154},{74.738,0.217443},{74.771,0.220733},{74.804,0.225942},{74.837,0.229501},{74.87,0.233596},{74.904,0.239381},{74.937,0.243794},{74.97,0.250129},{75.003,0.254638},{75.036,0.259594},{75.069,0.266791},{75.102,0.272708},{75.135,0.280225},{75.168,0.286304},{75.201,0.294463},{75.233,0.301094},{75.266,0.309735},{75.3,0.316702},{75.333,0.324539},{75.366,0.332695},{75.4,0.3427},{75.433,0.352938},{75.466,0.363334},{75.499,0.373573},{75.531,0.383886},{75.564,0.392686},{75.597,0.400206},{75.63,0.405805},{75.663,0.414404},{75.697,0.423062},{75.73,0.432275},{75.762,0.441723},{75.795,0.450937},{75.828,0.460329},{75.861,0.469574},{75.894,0.478018},{75.927,0.485343},{75.961,0.491474},{75.994,0.495995},{76.027,0.497268},{76.06,0.490378},{76.093,0.48685},{76.125,0.474117},{76.159,0.465758},{76.192,0.454619},{76.225,0.432919},{76.258,0.414738},{76.291,0.391278},{76.324,0.368156},{76.357,0.344888},{76.39,0.323379},{76.423,0.303791},{76.456,0.286443},{76.489,0.271034},{76.522,0.250037},{76.556,0.229126},{76.589,0.209889},{76.622,0.191613},{76.655,0.175856},{76.689,0.166238},{76.722,0.153977},{76.755,0.146995},{76.788,0.141294},{76.821,0.132634},{76.853,0.128412},{76.886,0.12476},{76.919,0.121907},{76.952,0.118894},{76.985,0.11618},{77.018,0.113294},{77.0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which looks like this plotted:
How can I fit both peaks at the same time using NonLinearFit? And also how can I find the area under the curve for both peaks?
EDIT: I would say that the answer provided by @MarcoB is great and the only thing remaining to ask is if somone knows what equation would be most ideal to better fit both peaks?. I appreciate it in advanced.
EDIT2: I tried using the software origin to try to find what is the best peak for both peaks and it seems that the function BWF is the best for it as written below:
Can someone help me implement this equation with NonLinearFit?
