<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hello,<div><br></div><div>I am a freshman for Chimera, sorry for a possibly stupid question but i seem to be confused by the difference between threshold level in volume view and the sigma value that is used to contour the density map in some articles.</div><div><br></div><div>please help me out!</div><div><br></div><div>Thank you very much!</div><div><br></div><div><div apple-content-edited="true">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Zhihai Li<br><br><br></div>
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