indicator

问题 I am trying to compile the simple C example from this Tutorial on Ubuntu using gcc. What do I have to use as argument for gcc to include the needed libraries for #include <libappindicator/app-indicator.h> ? 回答1: If you used apt-get , Synaptic Package Manager , etc. to get the appindicator library (vs. building it from source), did you only install the libappindicator1 package or did you also install libappindicator-dev to get the libappindicator header files? Linux packages very often have

问题 An activity indicator view is useful in many applications. Any ideas about how to add, activiate and dismiss an activity indicator view on iPhone? All the methods for this are welcomed here. 回答1: Create: spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; [spinner setCenter:CGPointMake(kScreenWidth/2.0, kScreenHeight/2.0)]; // I do this because I'm in landscape mode [self.view addSubview:spinner]; // spinner is not visible until

问题 I have a data.frame consisting of numeric and factor variables as seen below. testFrame <- data.frame(First=sample(1:10, 20, replace=T), Second=sample(1:20, 20, replace=T), Third=sample(1:10, 20, replace=T), Fourth=rep(c(\"Alice\",\"Bob\",\"Charlie\",\"David\"), 5), Fifth=rep(c(\"Edward\",\"Frank\",\"Georgia\",\"Hank\",\"Isaac\"),4)) I want to build out a matrix that assigns dummy variables to the factor and leaves the numeric variables alone. model.matrix(~ First + Second + Third + Fourth +