在Matlab中创建以下类型的符号余弦函数时：
-sin(q1-q2)我知道这两个符号从数学的角度来看是等价的，但是，我希望将变量c保存为sin(q2-q1)以获得连贯的符号计算，因为当我区分它时说<ul class="icons-ul">
<li><i class="icon-li icon-ok"></i>Bulleted lists (like this one)</li>
<li><i class="icon-li icon-ok"></i>Buttons</li>
<li><i class="icon-li icon-ok"></i>Button groups</li>
<li><i class="icon-li icon-ok"></i>Navigation</li>
<li><i class="icon-li icon-ok"></i>Prepended form inputs</li>
<li><i class="icon-li icon-ok"></i>…and many more with custom CSS</li>
</ul>
，我得到的是.icons-ul{
width:100px;
}
.icons-ul>li {
position: relative;
}
icons-ul {
margin-left: 2.142857142857143em;
list-style-type: none;
}
ul, ol {
margin-top: 0;
margin-bottom: 10px;
}
.icons-ul .icon-li {
position: absolute;
left: -2.142857142857143em;
width: 2.142857142857143em;
text-align: center;
line-height: inherit;
}
[class^="icon-"], [class*=" icon-"] {
display: inline;
width: auto;
height: auto;
line-height: normal;
vertical-align: baseline;
background-image: none;
background-position: 0% 0%;
background-repeat: repeat;
margin-top: 0;
}
，而不是cURL support: enabled
cURL Information: 7.46.0
Age: 3
Features
AsynchDNS: No
Debug: No
GSS-Negotiate: No
IDN: Yes
IPv6: Yes
Largefile: Yes
NTLM: Yes
SPNEGO: No
SSL: Yes
SSPI: No
krb4: No
libz: Yes
CharConv: No
Protocols: dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, ldaps, pop3, pop3s, rtsp, scp, sftp, smb, smbs, smtp, smtps, telnet, tftp
Host: x86_64-pc-linux-gnu
SSL Version: OpenSSL/1.0.2e
ZLib Version: 1.2.3.4
libSSH Version: libssh2/1.2.6
。