{ "info": { "author": "Ciaran Welsh", "author_email": "c.welsh2@newcastle.ac.uk", "bugtrack_url": null, "classifiers": [], "description": "Installation \n\nUse:\n pip install pydentify \nat command prompt or download and use:\n >>>python setup.py install \nfrom the downloaded directory\n \n \nAuthor: Ciaran Welsh. Email: c.welsh2@newcastle.ac.uk\n\nPydentify is a python package intended for use by systems biologists that \nare looking to fit experimental data to their models. Because of the dimensionality of the\nmodels in question the optimization process is diffult. Often parameters\ncannot be uniquely defined by the optimization problem. This is called a non-identifiability. \nCOPASI (Mendes et al 2009) is a software package that enables one to easily perform parameter estimation. \nPydentify uses COPASI as a 'parameter estimation engine' in order to calculate the profile likelihood \nmethod of identifiability analysis (Schaber, Biosystems 20012). \n\n\nInstructions \n\n\nBefore using this script to perform Identifiability analysis \nin Copasi, as described by Jorg Schabber, you must first define an\nappropriate CopasiML using the GUI. \n\nEnsure you have done the following:\n\t1) Ensure the parent .cps file is located in the SAME directory as the data files used for parameterization and that no other text files are present in this directory. Its best to have a dedicated folder for your identifiability analysis.\n\t2) Perform parameter estimation to locate the global minimum and update model. Alternatively you can use the repeat feature in COPASI's scan task to perform multiple parameter estimations and have the results written to a report. The latter procedure is best accomplished using a computer cluster. \n\t3) Create a new report from COPASI's 'output specifications' window that contains any, but only one estimated parameter and the RSS value. The latter can be found by checking the 'expert mode' button and then going to: 'ModelList>Root>TaskList>ParameterEstimation>ParameterEstimation>BestValue'.\n\t4) Ensure you are using Hook and Jeeves for all secondary parameter estimations. \n\t5) Create a scan in the parameter scan subtask with any estimated parameter:\n\t6) Change the scan subtask to parameter estimation\n\t7) Check the 'Log' checkbox to scan on a log scale\n\t8) Check the executable box in the top right hand corner of the scan window\n\t9) Define a report using the 'ProfileLikelihood' report that was previously defined. Name it anything and uncheck the 'append' and 'confirm overwrite' buttons. \n\t10) Delete any other reports that you have defined in other subtasks\n\t11) Delete any parameter sets or events that you have defined\n\t12) Ensure the time, volume and quantity units are properly defined as they are used in some calculations with Avogadro's constant.\n\nThen use: \n\n PL=ProfileLikelihood()\n PL.run(mode='slow')\n \n : absolute path to your configured copasi file\nor:\n MLP=MultiProfileLikelihoods(,[index],results_dir=)\n \n [index] : python list for index of parameter estimation runs you want to calcualte profile likelihoods for\n results_dir: absolute path to a directory containing parameter estimation output from copasi\n results_file: absolute path to file containing patameter estimation data\nWhich depends on the module 'InsertCopasiParameters' provided with pydentify.py. \n\n#Note that for some reason this program will not run from a Dropbox (or similar) directory\n \n#Also, if you have to stop running the script half way through and attempt to restart, \n\nTo visualize results:\n\nIf using pydentify.ProfileLikelihood():\n \n P=pydentify.Plot(copasi_file,RSS_i)\n copasi_file: an appropiately configured copasi file\n RSS_i: the RSS value for the original parameter estimation \n P.plot_all(savefig=True)\n \nIf using pydentify.MultiProfileLikelihood():\n\n MP=pydentify.MultiPlot(copasi_file,results_dir=)\n \n OR\n \n MP=pydentify.MultiPlot(copasi_file, results_file=)\n \n where:\n copasi_file: an appropiately configured copasi file\n results_dir: full path to a results directory (containing multi files of parmaeter estimation data in txt format, such as the output from copasi parameter estimation)\n results_file: full path to a results file containing parameter estimation data (xlsx/xls/csv/txt)\n \n Then \n MP.plot_index(0,savefig=True) #to plot index 0 of your multi profile likelihood\n or \n MP.plot_all_indexes(savefig=True,multiplot=False) ' #to plot all indexes \n MP.plot_all_indexes(savefig=True,multiplot=True) #to plot all profiles on the same graph for comparison. Resutls are viewed in the largest index folder as this is an iterative process\n\n References\n Mendes, P., Hoops, S., Sahle, S., Gauges, R., Dada, J. and Kummer, U. (2009) 'Computational modeling of biochemical networks using COPASI', Systems Biology, pp. 17-59.\n Schaber, J. 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