diff --git a/example/eemd_ex.cpp b/example/eemd_ex.cpp
index b0e553e..c905941 100644
--- a/example/eemd_ex.cpp
+++ b/example/eemd_ex.cpp
@@ -45,7 +45,7 @@
 
 #include "../lib/core.h"
 #include "../lib/io.h"
-#include "../lib/algorithm.h"
+#include "../lib/algorithms.h"
 
 using namespace gctl;
 
diff --git a/example/gnuplot_ex.cpp b/example/gnuplot_ex.cpp
index 7132345..2c429db 100644
--- a/example/gnuplot_ex.cpp
+++ b/example/gnuplot_ex.cpp
@@ -32,9 +32,11 @@ int main(int argc, char *argv[])
     gctl::gnuplot gt;
 
     //one line test
-    //gt.send("plot [-pi/2:pi] cos(x),-(sin(x) > sin(x+1) ? sin(x) : sin(x+1))");
+    gt.send("set terminal dumb");
+    gt.send("plot [-pi/2:pi] cos(x),-(sin(x) > sin(x+1) ? sin(x) : sin(x+1))");
 
     //buffer test (bessel animation)
+    /*
     gt.to_buffer();
     gt.send("set terminal gif animate delay 10 size 600,400");
     gt.send("set output 'bessel.gif'");
@@ -67,6 +69,7 @@ int main(int argc, char *argv[])
 
     gt.save_buffer("bessel");
     gt.send_buffer();
+    */
 
     //data test
     /*
diff --git a/lib/graphic/cliplot.cpp b/lib/graphic/cliplot.cpp
index 5c8285c..5c85bf3 100644
--- a/lib/graphic/cliplot.cpp
+++ b/lib/graphic/cliplot.cpp
@@ -119,23 +119,6 @@ void gctl::cliplot::set_hname(const std::string &hname)
     return;
 }
 
-std::string gctl::cliplot::axis_label(double num, int digs, int &odr)
-{
-    std::stringstream ss;
-    if (floor(log10(abs(num))) >= digs)
-    {
-        ss << std::scientific << std::setprecision(digs) << num;
-        odr = floor(log10(abs(num)));
-        if (num < 0) odr *= -1;
-    }
-    else
-    {
-        ss << std::fixed << std::setprecision(digs) << num;
-        odr = 0;
-    }
-    return ss.str();
-}
-
 void gctl::cliplot::plot_line(double x1, double x2, double y1, double y2, char s, const std::string &t)
 {
     if (x1 > x2)
@@ -178,6 +161,44 @@ void gctl::cliplot::plot_data(const std::vector<double> &x, const std::vector<do
 }
 
 void gctl::cliplot::display(std::ostream &os)
+{
+    if (new_screen_)
+    {
+        os << GCTL_CLEARALL;
+        GCTL_MOVEUP(os, height_);
+    }
+
+    plot_axis();
+
+    for (size_t i = 0; i < height_; i++)
+    {
+        for (size_t j = 0; j < width_; j++)
+        {
+            os << att_[i*width_ + j] << sym_[i*width_ + j] << GCTL_RESET;
+        }
+        os << std::endl;
+    }
+    return;
+}
+
+std::string gctl::cliplot::axis_label(double num, int digs, int &odr)
+{
+    std::stringstream ss;
+    if (floor(log10(abs(num))) >= digs)
+    {
+        ss << std::scientific << std::setprecision(digs) << num;
+        odr = floor(log10(abs(num)));
+        if (num < 0) odr *= -1;
+    }
+    else
+    {
+        ss << std::fixed << std::setprecision(digs) << num;
+        odr = 0;
+    }
+    return ss.str();
+}
+
+void gctl::cliplot::plot_axis()
 {
     for (size_t i = w0_; i < width_; i++)
         set(i, h0_, '-', GCTL_BOLD);
@@ -258,20 +279,5 @@ void gctl::cliplot::display(std::ostream &os)
     {
         set(w0_ + 6 + i, 0, hname_[i], GCTL_BOLD);
     }
-
-    if (new_screen_)
-    {
-        os << GCTL_CLEARALL;
-        GCTL_MOVEUP(os, height_);
-    }
-    
-    for (size_t i = 0; i < height_; i++)
-    {
-        for (size_t j = 0; j < width_; j++)
-        {
-            os << att_[i*width_ + j] << sym_[i*width_ + j] << GCTL_RESET;
-        }
-        os << std::endl;
-    }
     return;
 }
\ No newline at end of file
diff --git a/lib/graphic/cliplot.h b/lib/graphic/cliplot.h
index 198f732..e919978 100644
--- a/lib/graphic/cliplot.h
+++ b/lib/graphic/cliplot.h
@@ -55,7 +55,7 @@ namespace gctl
          */
         cliplot(size_t width, size_t height, double xmin, double xmax, double ymin, double ymax);
 
-        virtual ~cliplot();
+        virtual ~cliplot(); ///< 析构函数
 
         /**
          * @brief 清除画布数据
@@ -72,27 +72,97 @@ namespace gctl
          */
         void set(size_t w, size_t h, char sym, const std::string &att);
 
+        /**
+         * @brief 设置坐标轴刻度数量
+         * 
+         * @param xt_num x轴刻度数量
+         * @param yt_num y轴刻度数量
+         */
         void set_axis(int xt_num, int yt_num);
 
+        /**
+         * @brief 设置坐标轴刻度数字位数
+         *
+         * @param digs 数字位数
+         */
         void set_digs(int digs);
 
+        /**
+         * @brief 设置是否使用新的屏幕显示画布
+         *
+         * @param new_screen 是否使用新的屏幕显示画布
+         */
         void set_new_screen(bool new_screen);
 
+        /**
+         * @brief 设置坐标轴名称
+         *
+         * @param wname x轴名称
+         */
         void set_wname(const std::string &wname);
 
+        /**
+         * @brief 设置坐标轴名称
+         *
+         * @param hname y轴名称
+         */
         void set_hname(const std::string &hname);
 
-        std::string axis_label(double num, int digs, int &odr);
-
+        /**
+         * @brief 绘制直线
+         *
+         * @param x1 直线起点x坐标
+         * @param x2 直线终点x坐标
+         * @param y1 直线起点y坐标
+         * @param y2 直线终点y坐标
+         * @param s 直线字符
+         * @param t 直线字符属性
+         */
         void plot_line(double x1, double x2, double y1, double y2, char s = '.', const std::string &t = GCTL_BOLDGREEN);
 
+        /**
+         * @brief 绘制函数
+         *
+         * @param func 函数
+         * @param s 函数字符
+         * @param t 函数字符属性
+         */
         template <typename FuncOp>
         void plot_func(FuncOp func, char s = '.', const std::string &t = GCTL_BOLDGREEN);
 
+        /**
+         * @brief 绘制数据
+         *
+         * @param x x坐标
+         * @param y y坐标
+         * @param s 数据点字符
+         * @param t 数据点字符属性
+         */
         void plot_data(const std::vector<double> &x, const std::vector<double> &y, char s = '.', const std::string &t = GCTL_BOLDGREEN);
 
+        /**
+         * @brief 显示画布
+         *
+         * @param os 输出流
+         */
         void display(std::ostream &os = std::cout);
 
+    private:
+        /**
+         * @brief 计算坐标轴刻度标签
+         *
+         * @param num 数值
+         * @param digs 数字位数
+         * @param odr 数值的10的幂次
+         * @return std::string 坐标轴刻度标签
+         */
+        std::string axis_label(double num, int digs, int &odr);
+
+        /**
+         * @brief 绘制坐标轴
+         */
+        void plot_axis();
+
     private:
         bool new_screen_;
         int digs_; // 数字位数（包括小数点）