Is changing ones mind hypocritical?

I was having a conversation with this leftist friend of mine, I'm what you call a classical liberal. We were having a conversation about something, subject irrelevant, but I came across some new information, and changed my stance on it. I have always maintained that I will change my mind if I come across data what is compelling enough to change it. Here is the comical thing, I changed my opinion more in my leftist friends direction. And he tells me I'm a hypocrite because I changed my mind.

How in the hell is changing my mind hypocritical?
Is changing ones mind hypocritical?
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