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matlab7.0 编程基础 电子教程,大家看看有需要的吗

style='font-size:12.0pt;font-family:宋体;mso-font-kerning:0pt'>a=fread(fp,size)<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span style='font-size:12.0pt;
font-family:宋体;mso-font-kerning:0pt'>从文件<span lang=EN-US>fp中读取数据保存到矩阵a中<o:p></o:p></span></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?a=fread(fp)<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?whos<span
style="mso-spacerun: yes">&nbsp; </span>Name<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Size<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Bytes<span
style="mso-spacerun: yes">&nbsp; </span>Class<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>a<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>344x1<span
style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>2752<span
style="mso-spacerun: yes">&nbsp; </span>double array<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>fp<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>1x1<span
style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>8<span style="mso-spacerun: yes">&nbsp; </span>double array<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>st<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>1x1<span
style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>8<span style="mso-spacerun: yes">&nbsp; </span>double array<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>t<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>1x1<span
style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>8<span style="mso-spacerun: yes">&nbsp; </span>double array<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:21.0pt'><span lang=EN-US
style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>Grand
total is 347 elements using 2776 bytes</span><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;mso-font-kerning:0pt'><o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:1.0gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;mso-font-kerning:0pt'>2．指定格式读取<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:1.0gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;mso-font-kerning:0pt'>a=fscanf(fp,format,size)<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:1.0gd'><span style='font-size:12.0pt;
font-family:宋体;mso-font-kerning:0pt'>从句</span><span style='font-size:12.0pt;
font-family:宋体;mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt'>柄<span
lang=EN-US>fp所指定的文件中，按字符串format所指定的数据格式读取数据，把他们保存到矩阵a中。<o:p></o:p></span></span></p>

<p class=MsoNormal style='margin-left:1.0gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?str=fscanf(fp,'%s')<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:1.0gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>str =<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:1.0gd;text-indent:30.0pt'><span
lang=EN-US style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:
0pt'>''</span><span lang=EN-US style='font-size:12.0pt;font-family:宋体;
mso-font-kerning:0pt'><o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;mso-font-kerning:0pt'>3．将数据写入文件中。<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;mso-font-kerning:0pt'>fprintf(fp,format,A,B,…)<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span style='font-size:12.0pt;
font-family:宋体;mso-font-kerning:0pt'>将字符串所指定的数据写入到由<span lang=EN-US>fp所指定的文件中。<o:p></o:p></span></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?t=0:0.001:1;<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?fp=fopen('ok.mat','w');<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?fprintf(fp,'%d',t);<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?length(t)<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>ans =<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>1001<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?clear<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?fp=fopen('ok.mat','r');<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?fread(fp);<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?whos<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>Name<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Size<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Bytes<span
style="mso-spacerun: yes">&nbsp; </span>Class<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>ans<span style="mso-spacerun:
yes">&nbsp;&nbsp; </span>12989x1<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>103912<span
style="mso-spacerun: yes">&nbsp; </span>double array<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'><span
style="mso-spacerun: yes">&nbsp; </span>fp<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>1x1<span
style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>8<span style="mso-spacerun: yes">&nbsp; </span>double array<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>Grand total is 12990
elements using 103920 bytes<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>?length(ans)<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd'><span lang=EN-US style='font-size:
12.0pt;font-family:宋体;color:blue;mso-font-kerning:0pt'>ans =<o:p></o:p></span></p>

<p class=MsoNormal style='margin-left:.86gd;text-indent:42.0pt'><span
lang=EN-US style='font-size:12.0pt;font-family:宋体;color:blue;mso-font-kerning:
0pt'>12989<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:12.0pt;font-family:宋体;mso-font-kerning:
0pt'>前后比较一下就可以看出他们的不同之处了，也便于分析。<span lang=EN-US><o:p></o:p></span></span></p>


<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US
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