I have an exponential model calculated with mod <- nls(y ~ exp(- (x/a)^b), data = DF, start = list(a = 200, b = 1.4))
Why doesn\'t a model matrix necessarily have the same number of rows as the data frame? mergem = model.matrix(as.formula(paste(response, \'~ .\')), data=mer开发者_如何学运维gef)
I\'m little confused about controller and model in MVC framework (codeIgniter). Its clear to me that controller methods calls the views and Model methods interact with database.
i have existing website. and i write the new back-end (in cakephp) without changing front-end programm
I want t开发者_Python百科o set the choices for one of my fields based on the keyword arguments given to the model constructor. Does it make more sense to do this in the Model __init__ method or the sa
I have two part开发者_JS百科ial views which are exactly the same, but for the @model. @model Project.Models.X
I\'m trying to access the errors array to display in my view, but I\'m writing to it inside a lambda within the model. I keep getting:
i have a big problem setting up an associated store/model concept. I have the models/store app.models.User = Ext.regModel(\'app.models.User\', {
I am learning GLSL by going through a tutorial on the Web. The tutorial has an example called the Toon Shading. Here is the link to Toon Shading - Version I.
In my app, I want to support a blank date field as meaning \"some indefinite date in the future\", both upon entry and viewing.Since I\'m storing this in the database and nil sorts before any non-nil
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