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...dly overwritten by plot(). Also even if I close the device with dev.off() the memory is never released, even after a gc() pass. In fact the gc() pass reports way less memory used than what the system reports. I can understand a discrepancy in the numbers here, but 9.1Mb (reported by gc()) versus 415Mb (reported by the system) is not normal in my eyes. With the png() device, the results were less conclusive. I'd say there was a slight overall augmentation of used memory, but may that's just me. Note that this device creates many files by default and the problem does not seem to happen w...