n4ahmad
Civil/Environmental
- Sep 14, 2010
- 1
I am new learner of Mat lab. I want to transfer a big following data from excel into Mat Lab. In Mat lab, I am interested to find polynomial of X (constant) with different values of Y to get polynomial of each. Then I want to double differentiate each polynomial with respect to X and put equal to zero. Then I want to solve this equation to get value of X.
X: 1 2 3 4 5 6 7 8
Y: 9 8 7 6 5 4 3 2
Y: 7 6 5 4 3 2 1 0.5
Y: 9 7 6 5 4 3 2 1
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In this procedure I am facing following problems.
1- What should be format of file in importing data into Matlab
2- I will use coef = Polyfit(x,y,n) to get coefficient of equation. But, in Mat lab, I cannot find differentiation by using coefficient of an equation.
3- How will I write the loop of program because there are lot of values
X: 1 2 3 4 5 6 7 8
Y: 9 8 7 6 5 4 3 2
Y: 7 6 5 4 3 2 1 0.5
Y: 9 7 6 5 4 3 2 1
---------------
--------------
In this procedure I am facing following problems.
1- What should be format of file in importing data into Matlab
2- I will use coef = Polyfit(x,y,n) to get coefficient of equation. But, in Mat lab, I cannot find differentiation by using coefficient of an equation.
3- How will I write the loop of program because there are lot of values
