Getting A Blank Plot From Code

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Luis
Luis 2022-11-21
回答： David Hill 2022-11-21
I am attempting to plot the relation between two variables, but when I run the plot command, I receive a blank graph. Here is my code:
>> Yp=62e9;
>> Yfca=250e9;
>> yfsi=480e9;
>> d31=-320e-12;
>> a=linspace(0,1);
>> d31eff=-d31./((log(1-a)).*(1./a-0.5));
>> vp=1;
>> d31multi=d31eff.*Yp.*vp./((Yp-Yfca)*vp+Yfca)
>> plot(a,d31multi/d31eff)

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回答（2 个）

Star Strider
Star Strider 2022-11-21
Ran in:
It is necessary to do element-wise division in the plot call second argument:
d31multi./d31eff
However there are other problems, and I must defer to you to solve.
Yp=62e9;
Yfca=250e9;
yfsi=480e9;
d31=-320e-12;
a=linspace(0,1);
d31eff=-d31./((log(1-a)).*(1./a-0.5));
vp=1;
d31multi=d31eff.*Yp.*vp./((Yp-Yfca)*vp+Yfca)
d31multi = 1×100
1.0e-09 * NaN -0.3200 -0.3200 -0.3200 -0.3200 -0.3199 -0.3199 -0.3199 -0.3198 -0.3198 -0.3197 -0.3196 -0.3196 -0.3195 -0.3194 -0.3193 -0.3192 -0.3191 -0.3189 -0.3188 -0.3186 -0.3185 -0.3183 -0.3181 -0.3180 -0.3178 -0.3175 -0.3173 -0.3171 -0.3168
Lv = ~isnan(d31multi);
plot(a,d31multi./d31eff)
.
David Hill
David Hill 2022-11-21
Ran in:
Yp=62e9;
Yfca=250e9;
yfsi=480e9;
d31=-320e-12;
a=linspace(0,1);
d31eff=-d31./((log(1-a)).*(1./a-0.5));
vp=1;
d31multi=d31eff.*Yp.*vp./((Yp-Yfca)*vp+Yfca)
d31multi = 1×100
1.0e-09 * NaN -0.3200 -0.3200 -0.3200 -0.3200 -0.3199 -0.3199 -0.3199 -0.3198 -0.3198 -0.3197 -0.3196 -0.3196 -0.3195 -0.3194 -0.3193 -0.3192 -0.3191 -0.3189 -0.3188 -0.3186 -0.3185 -0.3183 -0.3181 -0.3180 -0.3178 -0.3175 -0.3173 -0.3171 -0.3168
plot(a,d31multi./d31eff);%forgot the '.' all ones

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