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/*
     * ±£´æexcelÖеÄͼƬ(ÒÔÎļþÐÎʽ±£´æ£¬»òÕß´æÈëÊý¾Ý¿â)
     *
     * basePath:Ó¦ÓÃËùÔÚ·¾¶,¸½¼þ´æ·Å·¾¶:
     * ²ÎÊý£ºisÊÇÉÏ´«µÄ¸½¼þÎļþÁ÷
     */
    public void saveSheetImgByFile(String basePath,InputStream is) throws ParseException {
        FileOutputStream os = null;
        try {
            Workbook wbk = Workbook.getWorkbook(is);
            //½¨ÎļþĿ¼
            File mkFile = new File(basePath);
            if (!mkFile.exists() && !mkFile.isDirectory()) {
                mkFile.mkdirs();
            }
            // Ñ­»·ËùÓÐsheet
            for (int k = 0; k < wbk.getNumberOfSheets(); k++) {
                Sheet sheet = wbk.getSheet(k);
                // ¹²ÓжàÉÙÐÐ
                int imgNumber = sheet.getNumberOfImages();// »ñµÃsheetËù°üº¬µÄͼƬÊý
                // Ñ­»·sheetµÄËùÓÐͼƬ
                for (int i = 0; i < imgNumber; i++) {
                    Image image = sheet.getDrawing(i);
                    byte[] imageD


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/**
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* @author Administrator
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*/
public class LeastSquareMethod {
private double[] x;
private double[] y;
private double[] weight;
private int m;
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