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# FC93

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Substracting matrix with NaN values
I have 4 matrix A, B, C and D. All matrix have NaN values, and matrix C and D have a lot of NaN values. Now I want to take A and...

6 years 前 | 2 个回答 | 0

### 2

Sort stocks into portfolios based on two characteristics
I have 3 matrix with the dimension 235x7690. The 235 represent months, the first month is june 1995, and 7690 are the number of ...

6 years 前 | 1 个回答 | 0

### 1

Create new matrix based on an existing one
I have a big matrix. Now I want to create a new matrix that takes the first value in each column and changes the following 11 va...

6 years 前 | 1 个回答 | 0

### 1

Replace values in a matrix below 1% and above 99%
I have a big Matrix. In the Matrix I have a lot of values but also some NaN. Now £I want to replace all values that are below 1%...

6 years 前 | 1 个回答 | 0

### 1

change equal values in a column to nan
I have matrix with several columns and rows. Most of the columns are like (1.02 1.05 1.03 1.04 1.04 1.04 1.04 .. 1.04). No I wou...

6 years 前 | 1 个回答 | 0

### 1

How to put dates on de x-axis
I have a vector with different values. I want to plot it and that on the x axis the dates appear. I don't have any vectors with ...

7 years 前 | 1 个回答 | 0

### 1

Add various horizontal lines to a plot
How can I add various horizontal lines to a plot? I have a plot and now I want to add several horizontal lines. I would like to...

7 years 前 | 3 个回答 | 1

### 3

Delete all values in a row after the first value
Hi everyone I have a matrix with 3000 rows and 4 columns. the values in the matrix are just one and zero. The sum of each row...

7 years 前 | 2 个回答 | 0