I am trying to plot a graph of two variables z1 and z2 versus t. but for some values of t I am getting z2 values negative in a graph. How to make these z2 values zero?

Question

Puja 2024-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/2091406-i-am-trying-to-plot-a-graph-of-two-variables-z1-and-z2-versus-t-but-for-some-values-of-t-i-am-getti

回答： John D'Errico 2024-3-6

I am trying to plot a graph of two variables z1 and z2 versus t. but for some values of t I am getting z2 values negative in a graph. How to make these z2 values zero for some values of t?

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Answer 1

Star Strider 2024-3-6

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在 MATLAB Online 中打开

One approach —

z2 = randn(1,10)
z2 = 1×10
    0.3138   -0.3598    0.9730    0.3409    0.8508   -2.6376   -1.2036   -2.4293    1.4585   -1.1442
z2(z2<0) = 0
z2 = 1×10
    0.3138         0    0.9730    0.3409    0.8508         0         0         0    1.4585         0

.

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Answer 2

John D'Errico 2024-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/2091406-i-am-trying-to-plot-a-graph-of-two-variables-z1-and-z2-versus-t-but-for-some-values-of-t-i-am-getti#answer_1422151

在 MATLAB Online 中打开

Another approach...

z2 = randn(1,7)
z2 = 1×7
   -1.0673   -0.3280    2.2819   -0.8316   -0.8863   -0.0035    1.4951
z2 = max(z2,0)
z2 = 1×7
         0         0    2.2819         0         0         0    1.4951