close?all

x0?=?0;
y0?=?0;

%?CASE-1?:?Only?random?error:?
%?Accurate?but?not?precise

sigma?=?2;

x1?=?x0?+?sigma*randn（1400）;
y1?=?y0?+?sigma*randn（1400）;

scatter（x1y1）;
hold?on
plot（x0y0‘.r‘‘markersize‘25）;
axis（[-15??15??-15??15]）
xlabel（‘X?VALUES‘）
ylabel（‘Y?VALUES‘）

%?CASE-2?:?Both?bias?and?random?error:?
%?Neither?Accurate?nor?precise

x_bias?=?7;
y_bias?=?-5;

x2?=?x0?+?x_bias?+?sigma*randn（1400）;
y2?=?y0?+?y_bias?+?sigma*randn（1400）;

figure
scatter（x2y2）;
hold?on
plot（x0y0‘.r‘‘markersize‘25）;
axis（[-15??15??-15??15]）
xlabel（‘X?VALUES‘）
ylabel（‘Y?VALUES‘）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-03-25?12:06??Acharya_Companion?website?material\C2F_Programs\
?????文件?????????621??2013-09-27?10:31??Acharya_Companion?website?material\C2F_Programs\accu_prec.m
?????目錄???????????0??2014-03-25?12:06??Acharya_Companion?website?material\C3F_Programs\
?????文件??????????49??2008-07-10?17:59??Acharya_Companion?website?material\C3F_Programs\Efun.m
?????文件????????2604??2013-07-29?14:00??Acharya_Companion?website?material\C3F_Programs\ground_trace.m
?????文件????????2369??2013-10-30?00:39??Acharya_Companion?website?material\C3F_Programs\orbit.m
?????文件????????4128??2013-07-28?17:03??Acharya_Companion?website?material\C3F_Programs\sat_pos.m
?????目錄???????????0??2014-03-25?12:06??Acharya_Companion?website?material\C4F_Programs\
?????文件?????????544??2013-12-24?23:35??Acharya_Companion?website?material\C4F_Programs\autocorr_gold.m
?????文件?????????607??2013-12-21?21:57??Acharya_Companion?website?material\C4F_Programs\autocorr_prn.m
?????文件?????????209??2013-12-21?20:13??Acharya_Companion?website?material\C4F_Programs\autocorr_rand.m
?????文件?????????795??2013-12-26?10:35??Acharya_Companion?website?material\C4F_Programs\boc_mod.m
?????文件?????????583??2013-12-25?02:59??Acharya_Companion?website?material\C4F_Programs\bpsk_mod.m
?????文件?????????920??2013-12-06?00:24??Acharya_Companion?website?material\C4F_Programs\data_psd.m
?????文件?????????178??2013-12-23?23:23??Acharya_Companion?website?material\C4F_Programs\m_sequence.m
?????文件?????????895??2013-12-24?00:14??Acharya_Companion?website?material\C4F_Programs\prn_psd.m
?????目錄???????????0??2014-03-25?12:06??Acharya_Companion?website?material\C6F_Programs\
?????文件?????????624??2013-12-12?17:06??Acharya_Companion?website?material\C6F_Programs\Bancroft.m
?????文件??????????49??2008-07-10?17:59??Acharya_Companion?website?material\C6F_Programs\Efun.m
?????文件???????10265??2008-07-12?14:49??Acharya_Companion?website?material\C6F_Programs\estimate.m
?????文件????????6308??2013-12-12?19:28??Acharya_Companion?website?material\C6F_Programs\find_pos.m
?????文件?????????105??2013-12-12?16:07??Acharya_Companion?website?material\C6F_Programs\lorentz.m
?????文件???????10602??2013-12-12?23:21??Acharya_Companion?website?material\C6F_Programs\mdb.txt
?????文件???????11220??2013-12-12?23:28??Acharya_Companion?website?material\C6F_Programs\obs.txt
?????文件????????7258??2013-12-12?20:19??Acharya_Companion?website?material\C6F_Programs\obs_wrong.txt
?????文件????????1623??2013-12-12?23:18??Acharya_Companion?website?material\C6F_Programs\position_main.m
?????文件?????????150??2013-12-12?14:00??Acharya_Companion?website?material\C6F_Programs\sat_pos.txt
?????目錄???????????0??2014-03-25?12:06??Acharya_Companion?website?material\C7F_Programs\
?????文件????????1297??2013-11-20?23:23??Acharya_Companion?website?material\C7F_Programs\eph_err.m
?????文件?????3132811??2012-04-26?00:41??Acharya_Companion?website?material\C7F_Programs\obs.txt
?????文件????????1312??2013-11-21?15:14??Acharya_Companion?website?material\C7F_Programs\posi_err.m
............此處省略6個文件信息