Chart.swift

public func BarChart(numbers : [Int]) -> NSImage {
    var endPoint = "http://chart.apis.google.com/chart?"
    endPoint += "cht=bhs" // bar chart
    endPoint += "&" + "chd=t:" + ",".join(numbers.map({String($0)})) // numbers
    endPoint += "&" + "chs=480x320" // size
    endPoint += "&" + "chds=a" // automatic data scaling
    endPoint += "&" + "chxt=x,y" // labels
    
    do {
        guard let url = NSURL(string:endPoint) else {return NSImage()}
        let data = try NSURLConnection.sendSynchronousRequest(
            NSURLRequest(URL: url), returningResponse: nil)
        guard let image = NSImage(data: data) else {
            print(NSString(data:data, encoding: NSUTF8StringEncoding))
            return NSImage()
        }
        return image
    } catch {print(error)}
    return NSImage()
}