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        <span style="font-family:Georgia;font-size:16px;">Dear all,</span>
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        <span style="font-family:Georgia;"><span style="font-size:16px;">I want to integrate latitude (y) over the temperature (T(x,y)). I tried to use the function "simpne" but It gives me an error which is "Must have three or more non-missing values".  </span></span>
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        <span style="font-family:Georgia;"><span style="font-size:16px;"><br>
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        <span style="font-family:Georgia;"><span style="font-size:16px;">Could you please suggest me an another way to do the integration?</span></span>
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        <span style="font-family:Georgia;"><span style="font-size:16px;"><br>
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        <span style="font-family:Georgia;"><span style="font-size:16px;">Millions of thanks and best regards,</span></span>
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        <span style="font-family:Georgia;"><span style="font-size:16px;">Chathu</span></span>
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        <span style="font-style:italic;"><span style="font-size:x-small;">Wickramage Chathurika Hemamali</span></span>
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                <span style="font-style:italic;"><span style="font-size:x-small;">Msc in Physical Oceanography</span></span>
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                        <span style="font-style:italic;"><span style="font-size:x-small;">State Key Laboratory of Tropical Oceanography</span></span>
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                        <span style="font-style:italic;"><span style="font-size:x-small;">South China Sea Institute of Oceanology</span></span>
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                        <span style="font-style:italic;"><span style="font-size:x-small;">University of Chinese Academy of Science</span></span>
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                        <span style="font-style:italic;"><span style="font-size:x-small;">China</span></span>
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