如何使用 Ferret 來繪圖?

繪圖四步驟

1. 讀入繪圖所需資料

2. 設定繪圖範圍

3. 使用適當指令來繪製圖表

4. 儲存圖表

• 繪圖範圍設定方式

  • 使用set region指令

    set region/x=x_start:x_end/y=y_start:y_end/z=z_start:z_end/t=t_start:t_end

    set region/i=i_start:i_end/j=j_start:j_end/k=k_start:k_end/l=l_start:l_end

    EX:
    set region/x=99E:124E/y=2N:24N
set region/i=1:100/j=50:59

  • 於繪圖指令中設定
    EX:
    contour/x=99E:124E/y=2N:24N topo

• 常用繪圖指令

  1. 曲線(plot)

     plot/d=data_set/x=x_start:x_end[y=,z=,t=]/hlimit=low:high:delta/vlimit=low:high:delta/overlay/color=color_name/title=title_name/nolabels/... var_name

     plot/d=data_set/i=i_start:i_end[j=,k=,l=]/hlimit=low:high:delta/vlimit=low:high:delta/overlay/color=color_name/title=title_name/nolabels/... var_name

     plot/hlimit=low:high:delta/vlimit=low:high:delta/overlay/color=color_name/title=title_name/nolabels/... var_name[d=data_set, x=x_start:x_end[y=,z=,t=]]

     plot/hlimit=low:high:delta/vlimit=low:high:delta/overlay/color=color_name/title=title_name/nolabels/... var_name[d=data_set, i=i_start:i_end[j=,k=,l=]]

  2. 等值線(contour)

     contour/d=data_set/x=x_start:x_end[y=,z=,t=]/levels=(low,high,delta)/pen=pen#/overlay/color=color_name/title=title_name/nolabels/... var_name

     contour/d=data_set/i=i_start:i_end[j=,k=,l=]/levels=(low,high,delta)/pen=pen#/overlay/color=color_name/title=title_name/nolabels/... var_name

     contour/levels=(low,high,delta)/pen=pen#/overlay/color=color_name/title=title_name/nolabels/... var_name[d=data_set, x=x_start:x_end[y=,z=,t=]]

     contour/levels=(low,high,delta)/pen=pen#/overlay/color=color_name/title=title_name/nolabels/... var_name[d=data_set, i=i_start:i_end[j=,k=,l=]]

  3. 等值面(shade)

     shade/d=data_set/x=x_start:x_end[y=,z=,t=]/levels=(low,high,delta)/palette=pal_name/overlay/title=title_name/nolabels/... var_name

     shade/d=data_set/i=i_start:i_end[j=,k=,l=]/levels=(low,high,delta)/palette=pal_name/overlay/title=title_name/nolabels/... var_name

     shade/levels=(low,high,delta)/palette=pal_name/overlay/title=title_name/nolabels/... var_name[d=data_set, x=x_start:x_end[y=,z=,t=]]

     shade/levels=(low,high,delta)/palette=pal_name/overlay/title=title_name/nolabels/... var_name[d=data_set, i=i_start:i_end[j=,k=,l=]]

  4. 向量圖(vector)

     vector/d=data_set/x=x_start:x_end[y=,z=,t=]/overlay/length=#/flowline/color=color_name/xskip=#/yskip=#/hlimit=low:high:delta/vlimit=low:high:delta/title=title_name/nolabels/... var_name_1, var_name_2

     vector/d=data_set/i=i_start:i_end[j=,k=,l=]/overlay/length=#/flowline/color=color_name/xskip=#/yskip=#/hlimit=low:high:delta/vlimit=low:high:delta/title=title_name/nolabels/... var_name_1, var_name_2

     vector/overlay/length=#/flowline/color=color_name/xskip=#/yskip=#/hlimit=low:high:delta/vlimit=low:high:delta/title=title_name/nolabels/... var_name_1[d=data_set, x=x_start:x_end[y=,z=,t=]], var_name_2[d=data_set, x=x_start:x_end[y=,z=,t=]]

     vector/overlay/length=#/flowline/color=color_name/xskip=#/yskip=#/hlimit=low:high:delta/vlimit=low:high:delta/title=title_name/nolabels/... var_name_1[d=data_set, i=i_start:i_end[j=,k=,l=]], var_name_2[d=data_set, i=i_start:i_end[j=,k=,l=]]