# Read and write range data

> Read and write the data of a range without exact timestamps.

A range knows its start and end time, so you can read and write its data without typing timestamps.

## Read from a range

[Enterprise](https://docs.synnaxlabs.com/reference/get-started/editions "Needs Synnax Enterprise")

**Console**

In the ranges toolbar, right-click a range and select **Add to new plot**. The Console opens a line plot of the range with no channels. Open the component toolbar and select channels in **Y1**.

To add the range to a line plot that is already open, focus the plot, then select **Add to active plot**. See [line plots](https://docs.synnaxlabs.com/reference/visualize/line-plots#choose-a-time-range).

**Python**

Use a channel name or [alias](https://docs.synnaxlabs.com/reference/ranges/aliases) as a property or a key of the range. The result acts as a NumPy array:

```python
my_range = client.ranges.retrieve(name="My Interesting Test")

data = my_range.my_precise_tc.to_numpy()
celsius = my_range["my_precise_tc"] - 273.15

# Read several channels as a frame
frame = client.read(my_range.time_range, ["my_precise_tc", "my_precise_pt"])
```

**TypeScript**

```typescript
const myRange = await client.ranges.retrieve("My Interesting Test");

const data = await myRange.read("my_precise_tc");
const celsius = Array.from(data, (v) => Number(v) - 273.15);

// Read several channels as a frame
const frame = await myRange.read(["my_precise_tc", "my_precise_pt"]);
```

## Write to a range

A write to a range starts at the start time of the range. Include the index channel of the data with timestamps inside the range.

[Enterprise](https://docs.synnaxlabs.com/reference/get-started/editions "Needs Synnax Enterprise")

**Python**

```python
import synnax as sy

my_range = client.ranges.retrieve(name="My Interesting Test")
start = my_range.time_range.start
my_range.write(
    {
        "my_time": [start + sy.TimeSpan.SECOND * i for i in range(3)],
        "my_precise_tc": [301.2, 301.5, 301.9],
    }
)
```

**TypeScript**

```typescript
import { TimeSpan } from "@synnaxlabs/client";

const myRange = await client.ranges.retrieve("My Interesting Test");
const start = myRange.timeRange.start;
await client.write(start, {
  my_time: [0, 1, 2].map((i) => start.add(TimeSpan.seconds(i))),
  my_precise_tc: [301.2, 301.5, 301.9],
});
```